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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Birchwood Casey Fast-Drying Fast-Acting Aluminum Black Metal Finish for Restoring Scratched and Marred Areas, Gun Cleaning, 3 Ounce Bulk Each

Product ID: 15845580

Details

Brand
Birchwood
Color
Black
Finish Type
Matte
Item Volume
90 Milliliters
Paint Type
Oil
Size
3 Fl Oz (Pack

⚡Fast-acting formula

🖤Deep black matte finish

🌡️Room temperature application

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€ 26.77

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Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🖤 Restore your gear’s edge with the pro’s fast black finish!

EFFORTLESS APPLICATION - Easy-to-use formula designed for smooth, no-dimension-change coverage—perfect for gunsmiths and trophy restorers alike.
VERSATILE MATTE FINISH - Produces a sleek deep gray to black finish depending on alloy, elevating the look of aluminum parts, plaques, and nameplates.
COMPACT READY FOR ACTION - 3 oz bottle size ideal for on-the-go touch-ups and maintenance, ensuring your gear always looks sharp.
RESTORE REVIVE INSTANTLY - Fast-drying liquid that quickly blackens aluminum, erasing scratches and marred surfaces with professional precision.
TRUSTED BY EXPERTS SINCE 1948 - Relied on by serious shooters and gunsmiths for unmatched quality and innovation in gun care products.

Birchwood Casey’s Fast-Drying Aluminum Black Metal Finish is a professional-grade, room temperature chemical solution designed to restore scratched and marred aluminum surfaces with a fast-acting, easy-to-apply matte black finish. Trusted by gunsmiths and collectors since 1948, this 3 oz liquid formula delivers durable, deep gray to black coloration ideal for gun parts, trophies, and engraved items.

Specifications

ASIN	B002JCW2CG
Age Range Description	Adult
Best Sellers Rank	#5,867 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #11 in Gun Lubrication
Brand Name	Birchwood Casey
Color	Black
Color Code	#333333
Container Type	Bottle
Customer Reviews	4.5 4.5 out of 5 stars (4,630)
Finish Type	Matte
Global Trade Identification Number	00029057151251
Included Components	see descritption
Indoor Outdoor Usage	Outdoor
Is Waterproof	False
Item Form	Liquid
Item Type Name	hunting-cleaning-and-maintenance-products
Item Volume	90 Milliliters
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	3 Fl Oz (Pack of 1)
Special Features	Works on aluminum and Sandium
Specific Uses For Product	Exterior
Surface Recommendation	Aluminum
UPC	029057151251
Unit Count	3.0 Fluid Ounces
Warranty Description	See manufacturer
Water Resistance Level	Not Water Resistant

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TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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