Buy a gallon of aircraft epoxy paint remover and a large plastic bowl. Disassemble the gun and put the slide and frame in the plastic bowl, cover it with the remover. Come back in 3 days and you will have what you seek. I buy and refinish at least one used CZ 75 a month. This is the easiest way I have found to get the Polycoat off without damaging the steel underneath. Polycoat is no joke and is very hard to remove unlike the older enamel finishes. I use Klean-strip brand remover and it will take off the Polycoat without any metal damage. I have one soaking now.