Not very versatile for sanding trim and backing plates. I think the best option would be: 3M Flexible Foam Abrasive Pad, Aluminum Oxide, 4-1/2" wide, 5-1/2" long, 3/16" thick, Grade FIN (pack of 20). Expensive and hard to find I kept some of these thinner pads and stuck 3M sandblast paper on them and found it better than these sponges.
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