Quote Originally Posted by Winky View Post
I want to hone my skills ... when I have, then I'll make repairs on some classic Triumph mc casings that are waiting for me to fix ... I want my repairs to look good as well as hold ... I'll get it down ... it's all good
If those are engine castings that have been soaked in oil, you have picked probably one of the hardest things to repair as a first project. Best to put that off for awhile. Castings in general are not the nicest alloys of aluminum, and the oil will cook out of the pores and mess you up even more. Go to a junkyard and grab some other castings to practice on before you light up on something not easy to replace. But until you have gone through at least a tank or two of argon, I'd stick to clean new material.