well after a good 2.5 hrs of going from 100 to 150 to 220 to 400 to 600 to wetsand 600... i was convinced that i had got out all the imperfections and was ready to polish:first pics... well after getting pissed off because the tripoli compound was being a bitch and was not wokring like it did the first time i showed you guys the small polished section...so after some tinkering time i used a different polish and polished up the plenum. Only to be very dissapointed with fine scraches in random places to piss me off. you most likely could not see them at all if it were in an engine and you are at normal distance looking in but if you get up clsoe you can see stuff. you cannot see aything in the pics but they're there and they piss the hell outta me. anyways here are the pics...