Quote Originally Posted by Robin Hewitt View Post
If it is cast iron you scrape it, use engineers blue to find the high spots. I would be very careful about introducing any kind of abrasive unless you are blessed with a Rowlingesque magic wand, "Accio grit"
Cheers. whats the best tool to scrap it with? looked in to this when setting up the lathe but looked like a "Black Art

What is Accio grit? Im sure Ive read that it ok to use abrasive compounds as long as it is properly cleaned with parrifin afterwards...