Let me know if any of this helps.

Robert

Well, this gives me some hope. I thought if I could find an oil based
enamel it would be thinner but it seems I can only find it in quarts
and like rust oleum, which says for metal substrates only.

I'll try buying some better paint than the home depot stuff and see if
I can get something to work.

Interesting you say "cap" but Graco sells a needle and an insert. The
cap is reused but I assume it is the same, the orifice is in the
threaded insert. I got the biggest one they say my gun will push. The
next bigger turbine will push the biggest but maybe thinning will
help.

Yes, I was at about 8 inches. I think I will try much less material
and slow down or do more passes to let it build.