Definitely need the heavy duty compound and please take this tip to heart.....
CLEAN THE PAD OFTEN WITH A TOOL OR IF YOU DONT HAVE ONE A SIMPLE METAL FORK FROM THE KITCHEN WILL DO
(Take the buffer at a slow to medium speed and hold the tines of the fork into the spinning pad to loosen and remove the built up compound/oxidation dust.)
This will help more than you know, most love the results after trying wool for the first time with the right compound....then results go down. First thing they do is think adding more compound must be the answer, this (no pun intended) compounds the problem. Keep that sucker clean and make sure it is a new pad. Follow up the buffing with a nice polishing or scratch reducing polish like Finesse 2 and then work your way up until you need to just seal it up with a heavy carnuba wax and apply 3-4 times a season to let it soak in.
1983 MasterCraft Stars and Stripes
Cream/Red Metal Flake "Powerslot"
"The misery that is now upon us is but the passing of GREED-the bitterness of men who fear the way of human progress. The hate of all men will pass, and dictators die and the power they took from the people will return to the people and so long as men die Liberty will never perish."