Re-coating Imco power-flow exhaust?

[Jungle Boy]

Has anyone re-done (powdercoat) a set of Power-Flow exhaust?. Mine have a few scuffs on them and I'm thinking of having them stripped and re-coated. The guy that I deal with says that if they go above 300°F it will dull the finish of his powdercoating. Anyone done this???

[flat broke]

JB,
They're PC'd from the factory, so I don't see what the problem is. Asside from that, the Stainless marine manifolds I used to run never got that hot externally. You could always put your hand on em for a couple of seconds, so I doubt they were anywhere near 300 degrees.
On another note, I forgot to give you props for your motor build up on the other thread. Very nice HP and TQ numbers for that not so small block
Good luck,
Chris

[Jungle Boy]

Thanks, I hope it works good. On the power coating thing, the guy that I use says that there are 2 types of coatings; high temp (400°F plus) and normal. I was just not sure if they come with the high temp finish from the factory. It would be the shits if I was to get them done and then they turn dull after a short period of time and end up looking worse than they do now. I guess I'll try to track down a email address from Imco and see if they finish them with the regular coating or high temp. Being aluminum, I'm sure that they are not supposed to get that hot.

[schiada96]

We cure pwdr coat here at 390 + or- 15 deg
I've done a couple of sets with no problems. The only thing you have to worry about is outgassing on a casting.

[Jungle Boy]

schiada96:
We cure pwdr coat here at 390 + or- 15 deg
I've done a couple of sets with no problems. The only thing you have to worry about is outgassing on a casting. What is outgassing?

[hack job]

when the metal puts out gas and cuases bubles( small ons) in the pc i would put them in the oven for 400 for aobut 1 hour with no pc on them then i would let them cool spray them and do it again. just my two cents and it has worked well for me. wink

[flat broke]

While Hackjob has the right idea, I'd like to add a little to it. On cast parts, I'd prefer to bring it up to baking temp slowly, then slowly bring it back down. (this is before you spray) The only thing I can't remember from when we did HJ's tunnel ram was weather or not we shot the part warm or at room temp. Maybe HJ can remember, better yet Schiada96 could share a little info on the proper prep method as I know he has a lot of experience with PC.
Chris

[miller19j]

Given that the part was powder coated once would out gassing really be an issue? WouldnÂ’t any pockets of gas trapped in the casting outgas during the first process?