so far so good with vht. you should only put one coat on, just enough to lay the color. any more than that and it will blister when you cure it with heat. you dont need to use the oven, you can cure it on the vehicle. run the engine for 10 minutes, cool for 20, run for 20, let cool, then run 30 under normal load. this is what the can sasys. about 6 bucks a can @ jegs