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Cast blast paint for exhaust manifolds

 
Old 07-30-2018, 07:39 PM
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Railroadman
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Default Cast blast paint for exhaust manifolds

Did a forum search for what paint would look good on my drive shaft and half shafts, and Seymour Cast Blast seems to get a lot of votes. I'll get some.

Then, as a separate project, I'm looking at their high temp stuff which I could put on the exhaust manifolds. But they say it needs to bake at 400 degrees for at least 2 hours. I have a patient, understanding wife, but I'm not THAT stupid! What do you guys do for stuff like that?
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Old 07-30-2018, 07:41 PM
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POR15 exhaust paint
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Old 07-30-2018, 07:54 PM
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1snake
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Hi-Temp Cast Blast is the way to go. I've used it on at least a dozen cars with no complaints. I just let the heat from firing up the engine cure it. Here's a pic of my 65 BB after curing the exhaust. The manifolds on my 60, that I did 30+ years ago with Cast Blast, still look just like this.

Last edited by 1snake; 07-30-2018 at 08:52 PM.
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Old 07-30-2018, 08:40 PM
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I should add I'm a long way from firing the engine, have not even torn it down yet. Trying to get ahead of the game by doing the manifolds and setting them on a shelf. I guess finding some hot rod guy with a kitchen oven in the shop is the best option. Or maybe browse CL for one of my own but that seems like overkill for something I won't do very often.
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Old 07-30-2018, 08:41 PM
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Por15 Manifold grey for me also.
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Old 07-30-2018, 08:51 PM
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Originally Posted by 67's View Post
Por15 Manifold grey for me also.
Does that need to be heat-cured?
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Old 07-30-2018, 09:38 PM
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All high temp paints should be control heat cured prior to using in anger. They will last significantly longer.

if you have the room, I bought an electric oven from Craig’s list for $25 because only one of the stove burners worked. He even delivered it to my house. I use the oven to cure powder coating, high temp paint, and to clean parts (it’s amazing how well ez off oven cleaner works on greasy parts when you have a little heat). Prior to that I had a toaster oven I got for a few bucks at a yard sale. You might luck out and find a toaster oven big enough for your manifolds. They work great for curing high temp paint, just make sure you preheat them first.
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Old 07-30-2018, 10:24 PM
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I used Seymour Cast Blast, and cured them in the bbq grill, with the outer burners on only, and the manifolds in the center. I figured the thermometer in the hood was close enough. I think they came out looking pretty good, but I haven't run them yet.



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Old 07-30-2018, 10:28 PM
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Originally Posted by Muttley View Post
I used Seymour Cast Blast, and cured them in the bbq grill, with the outer burners on only, and the manifolds in the center. I figured the thermometer in the hood was close enough. I think they came out looking pretty good, but I haven't run them yet.
And how did you prep those ?

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Old 07-30-2018, 10:32 PM
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Originally Posted by Frankie the Fink View Post
And how did you prep those ?
Long story short, these were Jet Hot coated years ago, but in a color that was way too silver. I sandblasted them just enough to give the surface some "tooth", then I painted them.
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Old 07-30-2018, 11:13 PM
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Here are some options side by side for you that I just happen to have on hand, but I am not going for judging or anything....
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Old 07-30-2018, 11:50 PM
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Wow, some nice looking parts there!
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Old 07-31-2018, 07:56 AM
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Excellent comp pic !!
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Old 07-31-2018, 10:33 AM
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Eastwood's high temp paint works well and lasts.

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Old 07-31-2018, 10:44 AM
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Originally Posted by C.T. View Post
Eastwood's high temp paint works well and lasts.
I use the high temp cast iron gray. Works great.
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Old 07-31-2018, 05:39 PM
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Originally Posted by Factoid View Post
They work great for curing high temp paint, just make sure you preheat them first.
You are talking about pre-heating the oven, not the work product, correct?
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Old 07-31-2018, 06:13 PM
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Don- use the cast blast

benton
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Old 07-31-2018, 07:45 PM
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Originally Posted by Railroadman View Post
You are talking about pre-heating the oven, not the work product, correct?
Yes, preheat the oven and ensure it is fully warmed up. Otherwise, you can get hot spots in the oven as it heats on full high which can burn your coating. Even the POR coating should be heated between 300 and 400 degrees for about 20 minutes, then turn the oven off and let the part sit in there until the temp returns to room temp. DON’T use the wife’s kitchen stove unless you want a big fight and chemical tastes in your food for a month or so.
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Old 07-31-2018, 08:28 PM
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Default cast iron high temp gray

Originally Posted by Railroadman View Post
Did a forum search for what paint would look good on my drive shaft and half shafts, and Seymour Cast Blast seems to get a lot of votes. I'll get some.

Then, as a separate project, I'm looking at their high temp stuff which I could put on the exhaust manifolds. But they say it needs to bake at 400 degrees for at least 2 hours. I have a patient, understanding wife, but I'm not THAT stupid! What do you guys do for stuff like that?





I prefer the brush on for irregular objects


Sandblasted first

I just did the exhaust for my 66 bb and was pleased with the way they turned out. I have used this before with good results. I like the brush on so you can get in tight places without runs.
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Old 07-31-2018, 08:31 PM
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Default And

Originally Posted by Vette5311 View Post


I prefer the brush on for irregular objects


Sandblasted first

I just did the exhaust for my 66 bb and was pleased with the way they turned out. I have used this before with good results. I like the brush on so you can get in tight places without runs.
I forgot to mention. You don't need to bake it. Engine heat cures it.

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