Engine paint?

[ProPont]

I second that. Same process I use and never had any problems with using automotive basecoat clearcoat system. It is a must to use a good etching primer.

[Al Moreno]

Guys here is pic of the heads getting smoothed. Do I need to make sure that any sand scratches are totally removed or will the primer fill them in?

[elitecustombody]

I would media blast if all possible or get it hot tanked. I like using Sherwin Williams GBP 988 etching primer in aerosol before paint. And yes, automotive paint will hold up just fine on the block, can't say that for the heads.They will need high-temp paint.

[Al Moreno]

Originally Posted by ratman67

the primer will fill them, and you want some scratches to get some physical adhesion. use a self etching primer first for adhesion then a conventional primer, to fill any scratches, finish with 220 grit then your paint system...

Thanks for the input guys! Prior to using the etching primer, what grit would you recommend to used to go over the bare aluminum to create some bite?

[elitecustombody]

Originally Posted by Al Moreno

Thanks for the input guys! Prior to using the etching primer, what grit would you recommend to used to go over the bare aluminum to create some bite?

180 grit before primer.Do not load on bunch of material,be it primer,paint or clear,it will only create problems.

[Al Moreno]

Thanks Jay, I had ordered the DX533 but unfortunately because I live in California it's not available

So any Californians that might have some suggestion I would greatly appreciate them!

[Al Moreno]

I figure I post an update on my son Nathan LS3 project. He finished removing all the casting off the block.

He even did the inside, LOL. Some body needs to take the grinder from him. Greg, you can say this is the "Freakin Cleanest Block In The Universe"!



Here is a in progress shot of the crank case.



Finished.



Next he had it blasted.





Now it's going to the machine shop to make clearance for a 418 forge internals. Any finally painted in a satin gun metal gray.