Any tips on removing vinyl numbers off Lexan don't want to ruin anything, windshield is marguard but side windows are not Thanks

Try WD-40, If that doesn't work good enough try rubbing alcohol. Works for me.

Don't forget the value of heat to soften the adhesive just prior to using a mild solvent. A hair dryer is your friend.

Hair dryer prior to removing the sticker. Some of the glue will be left after the sticker is peeled off. WD 40 will remove the glue. Don't use any abrasive towels to wipe.

I have used methanol to remove the left over residue once the stickers are removed.