I have an old set of double bubbles, I messed up spraying on tint. wanted to use them to practice cutting them down some, so any body with experience on cutting this type of material. what would be the best tool to use.
I use a Bosch jig saw with the finest toothed blade you can find (blades 'for metal' work well.)
Put blue masking tape over the cut line, mark on the tape. Do NOT cut too fast or with blade on high speed (hot blade can melt plastic making a sloppy edge.)
I usually cut in a bit from the opposite side rather than cutting all the way across. Be sure the plastic is well supported. After cutting, remove tape, sand and bevel edges with a dremel & fine sanding wheel (very light pressure!) Continue to smooth edges with 600, 1000, 2000 grit paper. Buff edges with dremel and buffing wheel.
I know its a long process, but the results will be worth it!