---
product_id: 4263100
title: "Presto Mag Liquid Gun Blue for Steel Complete Reblue Application, Gun Maintenance and Preservation, 3 Ounce (90ml)"
brand: "birchwood casey"
price: "€ 30.51"
currency: EUR
in_stock: true
reviews_count: 13
category: "Birchwood Casey"
url: https://www.desertcart.com.cy/products/4263100-presto-mag-liquid-gun-blue-for-steel-complete-reblue-application
store_origin: CY
region: Cyprus
---

# Fast-drying in seconds Precision 0.3mm fine tip Durable, rub-resistant finish Presto Mag Liquid Gun Blue for Steel Complete Reblue Application, Gun Maintenance and Preservation, 3 Ounce (90ml)

**Brand:** birchwood casey
**Price:** € 30.51
**Availability:** ✅ In Stock

## Summary

> 🖊️ Restore your gear like a pro—fast, flawless, and fuss-free!

## Quick Answers

- **What is this?** Presto Mag Liquid Gun Blue for Steel Complete Reblue Application, Gun Maintenance and Preservation, 3 Ounce (90ml) by birchwood casey
- **How much does it cost?** € 30.51 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/4263100-presto-mag-liquid-gun-blue-for-steel-complete-reblue-application)

## Best For

- birchwood casey enthusiasts

## Why This Product

- Trusted birchwood casey brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Touch-Up:** Fine 0.3mm tip reaches the smallest nicks and scratches for flawless, professional results.
- • **Long-Lasting Finish:** Creates a resilient blue-black coating that won’t rub off, keeping your gear looking sharp.
- • **Effortless Application:** No spills, no drips—just smooth, even coverage that beats traditional brush kits every time.
- • **Instant Restoration Power:** Quickly revives worn blued steel with one fast-drying coat—no heat or mess required.
- • **Trusted by Pros Since 1948:** Join the ranks of serious shooters and gunsmiths who rely on Birchwood Casey’s proven quality.

## Overview

The Birchwood Casey Presto Gun Blue Touch-Up Pen delivers a fast-drying, durable blue-black finish that instantly penetrates hard steel to restore scratches and wear spots. Featuring a precision 0.3mm tip, it offers easy, no-mess application trusted by professional gunsmiths and shooters since 1948. Perfect for maintaining and enhancing the look of your firearms with minimal effort.

## Description

BIRCHWOOD CASEY PRESTO GUN BLUE TOUCH-UP PEN Birchwood Casey Presto Gun Blue Touch-Up Pen penetrates hard steel instantly and gives a durable blue-black finish that won't rub off. Reacts quickly with usually one coat needed. No heat required. BIRCHWOOD CASEY Since 1948, serious shooters, avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products; Birchwood Casey has pioneered innovative products with an unwavering dedication to quality.

Review: Great for small scratches on vintage scopes - Worked well on a vintage scope. Cleaned and degreased it with alcohol prior and it looks good. Note: rubbing a graphite pencil ( I like to use a carpenter's flat pencil) with some gun oil will clean up some of the scratches and gunk fairly well. Just make sure all the oil is completely removed before applying the cold blue pen and follow the directions.
Review: Very Happy! - I installed new sights myself on my LC9 that didn't fill the dovetail joint all the way. Had about .010 of the base of the joint on each side of the front sight still exposed and the coating was very light under the original sight. Probably due to the original sight being installed then uninstalled which is normal. Also on the front sight, before installing the new sight, I had to clean up the front and rear "sharp" edges of the joint ever so slightly before installing the new sight. About .005 on both front and rear. Against that black of the slide, that silver stood out like a sore thumb! There was no damage, just the coating was worn. I looked on YouTube for a solution and saw this pen. So I tried it and it worked perfect!!! I cleaned only the area missing the coating with a cue tip lightly moistened with some acetone (wife's finger nail polish remover lol, same thing) very well. Let dry for a minute or so then used the pen. I went over the silver lines about 5 times letting it dry for a minute or so before each application. I also used a "NEW" soft bristle brush I bought from Harbor Freight (about a buck) every couple coats to kind of blend it a little. It was about 99% perfect. I don't think anyone else would of really noticed but me, but when I took a cleaning patch with a dab of gun oil and wiped it down even I couldn't see it anymore. I took another patch (no oil this time) and wiped the area as to get as much oil off as possible and it was absolutely perfect!!! Nothing came off and I couldn't even tell where I did the touch up. I really tried my best with a couple more clean patches to wipe it off and it still looked great. I see that some reviewers didn't have the same experience as I did and I was on the fence about buying this, but I'm glad I did. The job came out so great except for those darn lines that really bugged the heck out of me. Anyhow, problem solved!

## Features

- QUICK, EASY AND EFFECTIVE - The fastest and easiest way to touch up wear spots, nicks and scratches is with a simple easy to use Presto Gun Blue Pen from Birchwood Casey. It dries fast in most conditions
- INSTANT PENETRATION - Birchwood Casey Presto Gun Blue Pen penetrates hard steel instantly and gives a durable blue black finish that will not rub off. This compact pen is a must-have for you gun maintenance kit
- NO SPILL, NO DRIP PEN - Use this Birchwood Casey Presto Gun Blue Pen like a marking pen for one coat coverage on non-stainless steels. Fine tip of this pen allows to work in the most hard to reach areas
- EVEN APPLICATION - Say goodbye to messy scratch repair kits that require paintbrushes. This easy to use Birchwood Casey Presto Gun Blue Pen is the smartest way to touch up wear spots with a minimum of fuss
- BEST SHOOTING GEAR - Since 1948, serious shooters, avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products; Birchwood Casey has pioneered innovative products with an unwavering dedication to quality
- Penetrates hard steel instantly and gives a durable blue-black finish that won't rub off
- Used to touch-up nicks and scratches on blued surfaces
- No heat required
- Reacts quickly with usually one coat needed

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000TTIEY6 |
| Additional Features | firearm maintenance, gun cleaning, gun flooding |
| Age Range Description | Adult |
| Best Sellers Rank | #11,400 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #10 in Gunsmithing Tools |
| Body Shape | Round |
| Brand Name | Birchwood Casey |
| Closure Type | Snap |
| Color | Blue |
| Customer Reviews | 4.4 4.4 out of 5 stars (892) |
| Drill Point | Fine |
| Global Trade Identification Number | 00029057132014 |
| Grip Type | Smooth |
| Hardness | H |
| Included Components | Pen only |
| Ink Color | Blue |
| Item Dimensions | 7.5 x 3.75 x 0.75 inches |
| Item Type Name | Gunsmithing and Finishing |
| Item Weight | 0.05 Pounds |
| Line Size | 0.3mm |
| Manufacturer | GSM LLC |
| Material Type | Plastic |
| Model Name | Birchwood Casey Presto Gun Blue |
| Model Number | 13201 |
| Pattern | Solid |
| Recommended Uses For Product | Gun Maintenance |
| Style | Classic |
| Theme | Gun Maintenance |
| UPC | 029057132014 |
| Unit Count | 1.0 Count |
| Writing Instrument Form | Ballpoint Pen |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Birchwood Casey
- **Color:** Blue
- **Ink Color:** Blue
- **Writing Instrument Form:** Ballpoint Pen

## Images

![Presto Mag Liquid Gun Blue for Steel Complete Reblue Application, Gun Maintenance and Preservation, 3 Ounce (90ml) - Image 1](https://m.media-amazon.com/images/I/41XdgnEaIXL.jpg)

## Questions & Answers

**Q: Will this match the blueing of a mini 14 rifle?**
A: The finish builds up with every pass. Think of it like gentle, layered darkening. It isn't a perfect match--nothing short of complete re bluing will do that. This gets rid of bright areas of wear and it's not like paint at all.

**Q: How does this work on parkerized finishes?**
A: not very well....is streaked

**Q: Does it work for glock gen 4 made in USA?**
A: Not so sure. The Glock is not blued, but has a different metal finish, Tenefer, or something like that. If that's worn thru to white metal already, then the pen should work.

**Q: dose it work on black oxide**
A: Bluing is black oxiding, same thing

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for small scratches on vintage scopes
*by M***9 on March 26, 2026*

Worked well on a vintage scope. Cleaned and degreased it with alcohol prior and it looks good. Note: rubbing a graphite pencil ( I like to use a carpenter's flat pencil) with some gun oil will clean up some of the scratches and gunk fairly well. Just make sure all the oil is completely removed before applying the cold blue pen and follow the directions.

### ⭐⭐⭐⭐⭐ Very Happy!
*by T***S on May 4, 2014*

I installed new sights myself on my LC9 that didn't fill the dovetail joint all the way. Had about .010 of the base of the joint on each side of the front sight still exposed and the coating was very light under the original sight. Probably due to the original sight being installed then uninstalled which is normal. Also on the front sight, before installing the new sight, I had to clean up the front and rear "sharp" edges of the joint ever so slightly before installing the new sight. About .005 on both front and rear. Against that black of the slide, that silver stood out like a sore thumb! There was no damage, just the coating was worn. I looked on YouTube for a solution and saw this pen. So I tried it and it worked perfect!!! I cleaned only the area missing the coating with a cue tip lightly moistened with some acetone (wife's finger nail polish remover lol, same thing) very well. Let dry for a minute or so then used the pen. I went over the silver lines about 5 times letting it dry for a minute or so before each application. I also used a "NEW" soft bristle brush I bought from Harbor Freight (about a buck) every couple coats to kind of blend it a little. It was about 99% perfect. I don't think anyone else would of really noticed but me, but when I took a cleaning patch with a dab of gun oil and wiped it down even I couldn't see it anymore. I took another patch (no oil this time) and wiped the area as to get as much oil off as possible and it was absolutely perfect!!! Nothing came off and I couldn't even tell where I did the touch up. I really tried my best with a couple more clean patches to wipe it off and it still looked great. I see that some reviewers didn't have the same experience as I did and I was on the fence about buying this, but I'm glad I did. The job came out so great except for those darn lines that really bugged the heck out of me. Anyhow, problem solved!

### ⭐⭐⭐⭐⭐ Great for small touchups
*by B***N on June 24, 2025*

I bought this to touchup a few scuffs on an old 22 pistol that my grandfather gave me. It worked like a charm. I don’t think I would recommend it for large areas but for small bits it’s perfect.

## Frequently Bought Together

- Birchwood Casey Fast-Drying Fast-Acting Presto Gun Blue Touch-Up Pen for Restoring Scratched and Worn Areas, 1 Count (Pack of 1)
- Birchwood Casey Long-Lasting Fast-Drying Super Black Touch-Up Pen for Deep Scratches and Worn Areas, FLAT BLACK, 0.33 OUNCE
- Birchwood Casey Fast-Drying Fast-Acting Aluminum Black Metal Finish Touch-Up Pen for Restoring Scratched and Marred Areas

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-04-24*