Why :shrug: leave the block alone and paint the tin :doah: If you must paint the block :doah: just use Duplicolor high temp w/ceramic :thumbsup: and I have never used primer on the Tec blocks I have painted :no:
How True, I understand primer is a good thing, BUT
Look at 30 - 40 year old Bicycles, Equipment, ect.
If you truly check, there is no primer before they were painted.
I see this all the time with vintage bikes.
I did not prime the drag bike tank, I just made sure t was good an clean.
I always get a laugh out of Tec engines, Assemble and paint everything.
Everything, fuel line, linkage, carb, all of it and some, even the spark plug. :blink: were they too lazy
Well you could always see replaced parts, because they did not have paint on them. Or were another color.
.
.
I'm not saying don't prime it.
I understand the benefits to primer, but they did not do it back then.
I'm sure I don't have to say it but,
I would not trust any bearing that was in that engine.