[STATUTORY GRAPE]

Would base/clear withstand the heat of exhaust manifolds or would I be best off to just go with high temp rattle can paint?

[Rupe]

Most BC/CC is only good to about 200*F. And not for extended periods of time. You'd first get discoloration then a complete failure once all the solvents are baked out.

I'd send 'em off for powdercoat.

R

[lbell101]

Ya, that's not gonna work. Even SSU wouldn't handle that. A coating like jet hot or a dressing like PORs manifold dressing will hold up.

Larry

[swazo]

Headers and exhaust mani's get really hot! I'd bet the paint would flake off. The only cheapy method I've been able to get to work is using Thermo Tec's Hi-Heat coating. It's for their header wrap, but I've painted turbo manifolds, down pipes and other really hot exhaust parts with sucsess. The "ceramic" embedded crap from the local Napa or Pepboys flaked off pretty fast.

Your best bet is to get them either powder coated or ceramic coated (jet hot, HP coatings, etc).

[powderbill]

Just to make sure there is no misunderstanding, a standard powder coating will not withstand the high temperatures of exhaust manifolds. Only special powders designed specifically for high temp service would have any chance of surviving this temperaure (and even then, application parameters such as substrate cleanliness, surface profile, dry film thickness will all have to be just right).

[STATUTORY GRAPE]

What's "jet hot"? What do you suppose will happen if I spray them with the rattle can stuff? I don't mind discolor after they get hot, I just painted a motor and the manifolds were completely covered with rust so I sandblasted them and just need to cover them with something.

[swazo]

Jet hot is a ceramic type coating, and is the actual name of the company. http://www.jet-hot.com/

Here's HPC
http://www.hpcoatings.com/

The Thermo- Tec Hi-Heat Coating has a rating at 2000*. Like I said before, I've painted turbo exhuast housings, turbo manifolds, down pipes and other very hot exhaust parts and have not seen it fail. I used it on kits that I built, and on my own daily driver for over a year and a half with no flaking of any kind. I used black, but I believe they have white and silver too.

Make sure your prep work is solid, and you should be fine.