I’ve had good results using Mica powders. But only on smaller pieces…for some obscure reason? My experiments on stamping small pieces (2″ -4″ square) turn out great, but when I try to apply to larger pieces, the mica ‘spreads’. But works great with the smaller ones. I use Rubbing Alchohol to make a paste with the mica. Have used Ful Fuse and Tack fuse schedules with success.