Can this be used over aluminum to prevent oxidation

I shot a couple coats over two trim strips of aluminum on my car that had been engine-turned (overlapping decorative swirl pattern). It's been almost a month of (mostly) indoor and occasional outdoor exposure, and so far, it's holding up well with no yellowing or adhesion issues.

what is the actual drying time 1 or 2 hours? a can i have claims 2 hours.

2 hours is safe, but I've found this stuff is very humidity-sensitive regarding curing time. Dryness is way better than simply time in getting a quality result.

Does "urethane modified" mean this can be used over urethane-based paints?

It is strange that Amazon sent a purely technical question to an ordinary buyer. And I'll probably get it wrong. It is my understanding that the clear coat is guaranteed to be formulated for the Duplicolor family of products. On top of other paint, even if it is based on urethane, it may peel off.

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✨ Elevate your ride’s shine and protection—because your car deserves the best!

GLOSS THAT POPS - High-gloss clear coat for a showroom-worthy shine
FAST TRACK FINISH - Touch dry in just 15 minutes—get back to your project faster
UV GASOLINE SHIELD - Protects your paint from fading and chemical damage
ULTIMATE HEAT DEFENSE - Withstands up to 250°F for under-the-hood durability
VERSATILE APPLICATION - Perfect for interior, exterior, and engine bay use

Sherwin-Williams Duplicolor 1K Clear Extreme Gloss Finish Spray Paint delivers a high-performance, heat-resistant urethane-modified clear coat that dries to touch in 15 minutes and can be handled in 1 hour. Ideal for interior, exterior, and under-the-hood applications, it offers UV protection, gasoline resistance, and a durable gloss finish covering 12-15 sq ft per 12 oz can.

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Manufacturer	Sherwin-Williams Company
Part number	E1KCG0000
Item Weight	472 g
Package Dimensions	20.8 x 13.41 x 7.11 cm; 472 g
Item model number	E1KCG0000
Size	12 Ounce (Pack of 1)
Color	clear
Finish	Gloss
Item Package Quantity	1
Coverage	12-15 sq ft/12 oz
Special Features	Heat Resistant
Specific uses	Interior
Batteries Included?	No
Batteries Required?	No

Sherwin-Williams Company, Duplicolor 1K Clear Extreme Gloss Finish Spray Paint (12 oz)

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