Engine bay cleanup/restoration advice

[Stainless]

You could cover the threads with tape and spray the heads with paint or clearcoat... or send them off to have them professionally zinc-plated before you reinstall them... or just buy new zinc-plated bolts... depends on how much time and money you want to spend on the project.

What would be a good clear coat to use that can withstand the head of the engine?

[Farrar]

What would be a good clear coat to use that can withstand the head of the engine?

VHT makes one. A friend of mine used it to clearcoat his valve covers at one time. Sorry, I don't know the exact product name or number.

Edit: correction, it wasn't VHT. This was a few years ago and my memory is fading. Oops.

I know Rustoleum makes engine enamel. See if they have one in clear.

[David T]

VHT makes one. A friend of mine used it to clearcoat his valve covers at one time. Sorry, I don't know the exact product name or number.

Edit: correction, it wasn't VHT. This was a few years ago and my memory is fading. Oops.

I know Rustoleum makes engine enamel. See if they have one in clear.

I don't think there is a "high temp" clearcoat that won't start to yellow. Depends on how hot. A better way to prevent oxidation of aluminum is anodizing.
David Teitelbaum