After gunking off the head and further cleaning in the dishwasher, I noticed the cam journals don't look too healthy. There's quite a bit of swarf had scored the ally, probably the left overs from the vapour blasting years ago.
Q1. is the head and rocker cover scrap?
Q2. Can I just carry on using is as it is?
Q3. Why didn't the oil filter clean all the crap out?