Question about lacquer paint

[Digger]

I got a quart of un-thinned Coach Maroon paint with a car I bought, and need to paint the two pieces of the spare tire cover.

There’re is no label on the can, just written with a sharpie that it is un thinned lacquer paint.

Can I just thin it with standard lacquer thinner from the hardware store? Do I, and/or should I add any hardener, etc, and is there anything sold off the shelf in California I can use? Any advice is appreciated.