Hi- I have some sort of deposit on the bottom of my '72 Chimera that I tried sanding off with 120 grit. It didn't even touch it. before I hit it with 60 or 80, can someone tell me what it is? Boat has only seen freshwater as for as I know. Thanks!
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Mystery Crud on My Bottom! Can You Help?
Mystery Crud on My Bottom! Can You Help?
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