Quote Originally Posted by watwugy View Post
How about stainless steel? That's not magnetic, correct?
Some stainless steel is magnetic and some is not. Then there are various degrees of magnetic for different types of stainless. Stainless steel will more likely be confused with chrome plated steel than with aluminum. There is also the "spark test" using a grinder. Do a search on here using "stainless steel" and prepare to do some reading and take notes.