went out and bought one today with stand. planning on doing alot of custom fabrication here soon. well got it home and assembled and ran into my first problem trying to operate the machine. although it states it can bend alum, mild steel and stainless steel.....so far ive been unable to bend the SS. i immediatly grabbed a scrap piece of 16ga mild steel and it bent no problem. here is my question....is there any preperations to make to the sheetmetal before attempting to stretch or shrink? the stainless steel im attempting to bend is mirrored stainless. so its very slick. but due to the nature of stainless its very hard also.