i see where a few have used this. could i get some feedback as to how well it worked or didn't? did you do any sanding between coats? any tips on applying it and what did you top coat it with? ......
i'd spray 2 coats on. no sanding between coats. just spray and when it flashes( no longer wet looking but not flat dry) spray the next coat. as far as top coat. vht black is what i have used mostly. just be sure and prep the headers by sanding them very well eliminating all the rust you can. prime them. then sand rough down the primer with 400 grit and then spray 2 maybe 3 coats of top coat with around 4 to 5 mins between each coat
Are you using a ceramic paint? If so I think each coat has to be cured. I saw a write up on another forum. Let me look for it.
priming headers seems like an uneeded step JMO , ive painted many sets with the vht paints, as long as they are clean and not crusty the paint will not have any adhearing or flaking issues.
Im not sure if the primer is ceramic or not. But the paint is. Heres the write up I mentioned, I saw the car in person last week and it still looks just like the pics. Its a daily driver also so its gotten plenty of miles. http://www.d-series.org/forums/diy-...-header-look-new-again-vht-ceramic-paint.html
Why do you paint headers? i thought they were supposed to be crusty and flaky with rust. Unless stainless, then they should have that blue color with the cool rainbows. I like rainbows...
i have never primed headers before... this is the first time to use VHT paint. when looking at the different colors i saw the...high temp VHT Primer... you would think it was for the high temp paint... found this on their web site... "VHT Flame Proof Coating SP100 Flat Grey Primer is the base coat for the three part multi high performance coating system." still no instructions how to apply or cure/drying time...
primer is for more than just adhesion. it seals the metal to prevent rust and moisture between the metal and paint as well. that being said you would be perfectly fine not priming them. i also would look into to having them powder coated ot professionaly ceramic coated inside and out. saves headache as well it majorly decreases the heat output. plus it will last pretty much forever
I'll agree on the primer if it is of urethane or epoxy composition ,regular porous primers (laquer based/self etching/etc) have microscopic pores that actually trap moisture and could cause corrosion if not top coated in a relatively small time frame. on a high heat app you want as little surface thickness as possible to reduce the chances of flaking and component seperation. x2 on the ceramic coating with the high quality of work on "patches" it would seem wrong not to
thanks...:Handshake this is just to mock up and run in my new motor. they will be cermic coated after that. i am trying to keep them from rusting (they have been...milled, ground on, filed, sanded and glassbeaded) but i don't want them flaking or peeling off if any gets on the inside and messing up my O2 sensors...i guess i could run the motor in with them bare and glassbead off any rust before i send them to be coated... ......
That is what I would recommend. If you paint them....all of the paint is going to have to come off before they are coated.