what do you guys use to paint blocks with?
the longer my engine is sitting on a stand the more i consider it
Get it CLEAN, and then CLEAN it again... then use Duplicolor engine enamel. I use their primer and do two light coats, then a tack coat of enamel, let it sit 6-8 hours, then 2 medium wet coats.
Had very good look with that method. If you have stubborn greasy spots, you can hit them with a propane torch for 10-15 seconds to burn the crud off the outside of the block, as long as there are no gaskets/seals/plastic nearby (obviously).