Acetone-resistant clear plastic Is there a plastic that's clear, acetone resistant, and ideally sold in sheet stock that's ~1/8" or 1/4" thick?  Both acrylic and polycarbonate are out, they turn cloudy on contact with acetone.  I tried a piece of PETG and it was better, but still turned fairly cloudy after a few seconds.  I don't need continuous service, but I need it to still look decent if it gets wiped down with acetone.
According to Palstics International's Chemical Resistance Chart, the A-rated plastics (no solvent attack) towards acetone are:


ECTFE (Halar®): transparent films available 
Fluorosint® PTFE: white
HDPE: transparent films available
Nylon®, Type 6/6: white 
PP: clear sheets available 
PPS: opaque white
PTFE: white


Among these, polypropylene appears to be the only plastic that satisfies all criteria.