Charlest, when it comes to sanding materials for a bowling ball, You are the Man. You should write a book, seriously, you should write a book.
Have you tried the new Superpad foam pads from Supergrit?
They are a little less expensive then Abralon, and seem to last a little longer.
And they come in more grits, like 600, 800, 1200, 1500, 2500, and 3000. The grits not avavilable in Abralon.
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jls