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I think it's a waste of time and a perfectly good paint brush. It does look cool in the magazines.



What functional purpose does it serve. I use oven cleaner to remove it when I get an engine that someone has applied it to.



Do you know why its put in there? to allow the oil
to return easier... every bit of rough casting slows
the oil from returning... if you want you can polish
it but the paint is easier and does work