We are currently doing a raster image with a vector cut on some LazerMax no bigger than 1.25"/ea. I've found that soaking 10 or so in a cup of isopropyl (70% alcohol) and rubbing each one with my fingers will lift the residue out of the rastered image, take the flame marks off the back and get rid of the sticky edges. All this with very little effort (no scrubbing). Then immediatly rinse in tap water.
Don't use a rag or towel, as these get dirty from what it takes off, fills back in the raster and you have to do it again with a cleaner part of the towel. No cracking or ill effects have been noticed as far as I can see.
Anthony
"No man is a failure who has friends." -Clarence
I have never let my schooling interfere with my education. - Mark Twain
Anthony Welch
Laurel,MS
Skype: kemosabe62
Epilog Legend EX 45watt, Corel Draw 12 & x3, Photograv, Wacom tablet 4x5, ShopBot PRS96x48 w/spindle, airbrush and shop full of tools.