Would it be good for coating the bare aluminum after milling an 80% lower?

I wouldn't use it. I use a heat black paint (like you would repaint a BBQ grill) heat the receiver spray at least 6 coats heating slightly between the coats then let set a week. Saturate in Brake Free CLP let set for 1 month then you have a factory coat that resist scratches. I use this method for all AK-47 metal parts as well. Just remember to use Brake Parts Cleaner on the metal before painting to clean any oil even fingerprints off the bare metal.

Can this be used to touch up black anodized aluminum? Will it harm the surrounding anodized areas?

Yes! I used this to touch up a black anodized Vortex riflescope. The results are the scope looks brand new! Make sure to clean surface thoroughly first. I used an alcohol swab, then dry wipe with paper towel, then paper towel with a bit of dawn to degrease, then dry paper towel. I then used a large cotton swab to apply. I held it on for 30 seconds at a time with one minute breaks in between, for no more than 5 total times per scuff. Good luck!

Will this darken gold anodized aluminum??

Has to be clean, bare aluminum.

Will this only oxidize bare aluminum? Stone washed purple knife scales and want to darken up the bare (silver) aluminum coming through.

I used this to try and touch up a bare spot on a mossberg 500 shotgun. It actually etched the bare areas, and stripped off part of the remaining bluing(black). BUT after contacting mossberg I was told that their allow, and finish is not compatable with aluminum black. In short I cannot answer you're question except to say call the maker for a hint first..

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Sold byAmazon ColombiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🪵 Elevate your gun stock game with the pro’s choice finish!

RICH DEEP FINISH - Enhances and blackens surfaces for a sleek, professional look
FAST DRYING FORMULA - Get your gear battle-ready in just 24 hours
COMPACT CONVENIENT PACKAGING - Easy to store and maintain your prized firearms
PREMIUM AMERICAN CRAFTSMANSHIP - Proudly made in the USA for trusted quality
VERSATILE SURFACE COMPATIBILITY - Seamlessly restores wood, aluminum, and Sandium finishes

Birchwood Casey Tru-Oil Gun Stock Finish is a fast-drying, oil-based finish designed to restore and protect wood gun stocks and metal surfaces like aluminum and Sandium. With a 24-hour full cure time, it delivers a rich, blackened finish that enhances durability and aesthetics. Packaged in a compact 3 oz jar and proudly made in the USA, it’s the trusted solution for firearm enthusiasts seeking professional-grade care.

Specifications

ASIN	B002JCW2CG
Age Range Description	Adult
Best Sellers Rank	#73,169 in Home Improvement ( See Top 100 in Home Improvement ) #24 in Household Oil Finish
Brand	BIRCHWOOD CASEY
Brand Name	BIRCHWOOD CASEY
Color Code	#8B4513
Colour	multicolour
Container Type	Jar
Coverage	Full
Customer Reviews	4.5 out of 5 stars 3,809 Reviews
Dry Time In Hours	24
Finish Type	Oil
Full Cure Time	24 Hours
Global Trade Identification Number	00029057151251
Included Components	see descritption
Indoor Outdoor Usage	Indoor
Is Waterproof	False
Item Form	Liquid
Item Volume	90 Millilitres
Item Weight	85 Grams
Manufacturer	Birchwood Casey
Model Name	Fast-Drying Fast-Acting Aluminum Black Metal Finish for Restoring Scratched and Marred Areas
Model Number	BC-151
Paint Type	Oil
Part Number	BC-15125
Size	Onesize
Special Feature	Works on aluminum and Sandium
Special Features	Works on aluminum and Sandium
Specific Uses For Product	Aluminum surfaces, name plates, plaques, trophies, and other engraved items
Surface Recommendation	Wood
UPC	029057151251
Unit Count	88.72 Milliliters
Water Resistance Level	Not Water Resistant

Reviews

R**T

Aluminium black.

23.06.2025

C**R

Blackens Well

10.02.2026

D**Z

Una maravilla

25.02.2026

A**E

If you’re going to read a positive review, take heed to mine first

7.04.2026

J**N

Professional looking finish

6.02.2026

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