[frank jones]

Does anyone know if regular bc will hold up on the motor block. I would like it to match body color. Thanks

 

[39Hemi]

I'm not 100% sure of your question so I will answer this way...
BC/CC or Single Stage will hold up just fine on an engine block assuming you have done all the prep work correctly. If you are asking about using an uncleared base then I would not recommend it, the base is designed to be sealed with clear. When I build the hemi for my Plymouth truck project I will prime the block with Epoxy and then base/clear the engine to match the body color. I like the epoxy because I think it has the best adhesion of any primer and will still seal the metal even if the top coat gets scratched.

 

[stea]

Follow 39Hemi's advice and it will work fine. I was worried that it would burn off around the exhaust ports but so far it still looks great.

 

[frank jones]

painting block

thanks for the information. I have one more question. I have a harbor freight bottom feed spray gun for my epoxy primer, and primer filler. I have a Itawa 400 HVLP for my base coat and clear. My question is which gun do I need to use to spray the primer sealer? Primer gun has 1.7 tip and BC CC has a 1.3 tip.

 

[302 Z28]

If you do not want to fool with bc/cc you can get a high quality single stage catalyzed urethane that is just as durable as a bc/cc system.

In my experience spray bombs do not hold up long term, in spite of what they claim to be,

Vince

 

[39Hemi]

"thanks for the information. I have one more question. I have a harbor freight bottom feed spray gun for my epoxy primer, and primer filler. I have a Itawa 400 HVLP for my base coat and clear. My question is which gun do I need to use to spray the primer sealer? Primer gun has 1.7 tip and BC CC has a 1.3 tip."

Either gun will work although some people would choose not to spray any primer or sealer through their clear gun. If it were me I'd use the HF gun for the sealer, but then again if it were me I would not bother with sealer if I had already primed the block with epoxy. I like to use a thinned (10%) epoxy as sealer and on a casting that is not all that smooth I probably wouldn't even bother thinning the epoxy. Prime with epoxy let set overnight and then spray base and clear. If you are planning on a urethane primer to fill and smooth some of the casting you still really don't need sealer as long as the primer is a uniform color. My 2 cents...

 

[chadsbodyshop49119]

I would make sure the block is EXTREMELY clean.. You don't want to loose adhesion because you missed grease or oil..

Spray a coat or 2 of epoxy, let it sit all night then base clear the next day..
or single stage whatever you prefer..

Epoxy is definetely the correct way to go..

Basically as everybody stated here.