not sure if this is in response to my question...take a long screwdriver or something else like a rod and use it to clean your bonnet after every new section you buff. turn the buffer on and carefully draw the screwdriver (laid flat) across the bonnet like a needle on a record. compound will fling all over the place so watch out for that.
if you don't clean the bonnet you're dragging grime from one end of the boat to the other instead of removing it.