I have a swim platform that I need to replace the inner panel on one side and don't know how to make the rough area for grip. How do I do that?

If it is an in mold non skid it is probably from Gibco flex mold, they supply nearly all the oem's. Look it up on google our YouTube there are plenty of tutorials on installing their stuff. I have used there stuff several times with good results it can be tricky for a first timer

Thanks

Which pattern is best for bare feet?

Or you can paint it on--- inter grip by interlux, depending on area

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