Hiya Bill.
I also used to use Micro Mask a long time ago, and found it difficult to remove, especially if it was applied over acrylics paints, or if acrylic paints were sprayed over it.
Micro mask reacts with acyrlics and will bond to them like the preverbial to a blanket, so if you are masking over any acrylics I would advise you to stop.
Micro Mask really does bed down well on parts, leaving a thin film, and I have found that on clear parts a flattened toothpick helps a fair bit, but it is still too difficult for me, hence I changed to Bare Metal Foil.
Do you dip your clear parts in Future, or any other acrylic based coating?
If so, this might also be an issue using Micro Mask.
I can't say for sure as I have never used MM over Future, but Future is an acrylic floor covering, and that could also make it a little more difficult to remove.