Thanks Tim, the fins are not plugged up. It is a black paint with a hardner mixed in to ensure the paint stays durable. Would you happen to know off hand how hot a cylinder head gets while warmed up and running (assuming it is tuned properly) I could check the cylinder head with a heat gun to see if it is running at normal temperature
I haven't got a clue.
Where did you get the hardener for the paint? I've been looking for some for enamel.