or is there another way for gunk to end up on the outside of the liners like that?

I thought I had found a solution:

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=005&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=150165948748&rd=1

since this is going on the Z I'm getting rid of an still not sure if it will sell for parts or as a complete car I wasn't looking to spend a lot, just get it back together. Plus my exhuast manifold has square openings so an E88 would be a good match.

But the paint all over it makes me nervous. I know they often paint the outside of the heads but it looks like he hit the top mechanicals with flat black and the combustion chambers with gloss black.