I'll 3rd it on storing with the top up. For years I stored a drop top Vette with an updated Hartz Stayfast convertible top. Definitely eliminated wrinkles and having the top up, windows rolled up kept a few charcoal briquets on the floor to keep the interior from getting musty, eliminating any moisture that might accumulate in the garage. Also put a bar of Ivory Spring soap under the seat to keep her fresh

Regards,