just wanted to clarify Brightside is a type of Interlux boant paint. Rustoleum has rust stop, proffesional, etc. Interlux has perfection, brightside, toplac, etc. The brightside is a polyurethane. Also it is more to the tune of 22 bucks a quart and around 66 a gallon. The best price I've found on this paint is at http://www.boatersland.com I'm currently painting a boat with interlux brightside. The paint is some tuff stuff though and about a year back I bought two quarts of gloss black for the Z still have yet to put it on my car.