3M PI Fine Cut Compound Gumming - Why??

smprince1

New member
I am relatively new to paint polishing, but I have had pretty good success using the Poorboys SSR product line (they seem very user friendly, especially for a novice like myself).

Well, today I was doing a neighbor's car which had a ton of swirls and some scratches on a black Maxima. I thought I would try some 3M Perfect-It Fine Cut Compound since it is readily available in auto stores here.

I applied it to an Orange Sonus Cutting pad, dabbed around the car panel, spread it at 1-2 on PC, and then bumped it up to about 5 to work the polish. The first few times it seemed to go okay, the product worked for a minute or so, dusted, and I removed the residue to reveal a surface with maybe 1/2 or 2/3 of the swirls gone.

However, after a few cycles of applying polish, spreading, working in, etc. the pad got all gummed up. I tried to clean the pad with a soft bristle brush (from Autogeek made for cleaning PC pads), but the gumming up continued.

I was in my garage, about 60 degrees. I think I got all the water off the car from the washing/claying, but I can never be sure if a drop or two snuck out from under a crevice somewhere.

What did I do wrong? Too much product? Too little product? Wrong PC speed? Too much/little pad pressure? Wrong product? Do you think a water drop contaminated my pad?

Thanks in advance for any advice or experiences you might have. Until then, I think I will stick with Poorboys since they seem more forgiving but I still want to learn from this experience.
 
I've used this compound and it did the same thing to me with a rotary. What I did was after every appliaction I used a towel to clean the pad, and that seemed to cut down on the guming. I think thats all part of compound, also what you said about PB SSR lineup is right stick with that the SSR 2.5 will cut as good as compound any day
 
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