From my experience:

Old: small spray can
New: normal size spray can

The little can lasted longer than the big one. I could ahve done 2 sets of tails with the little can VS. one with the big can

Remember i'm only speculating they changed something in their product...i could have just gotten a bad can or something else....

99 SE V6\5spd - 156 HP\157 TQ 15.166-90.84 Totaled 02/12/06 99 SVT # 1571 - 175 HP\153 TQ 14.999-91.88 Born 3/24/99 Reborn 3/18/06 Pietenpol Racing Technologies project vehicle 90 Festiva L 5spd, Blue(not for long), 103k