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Two seasons ago I wet sanded the bridge then applied 3M Super Duty. Buffed out with DeWalt variable speed.
Then Collinites #920 Cleaner and Collinite Fleetwax.
The result was not so good, kinda krappy, swirl marks high and lows spots.
So I got to do this over and do it right and I think start removing the old wax.
So how should I go about this? Im a little shy about the wet sanding not wanting to get
to far into the gel coat. Would I use a 1000, 1500, 2500 Grits? any info appreciated.

Chuck,

Naptha will remove wax as will Dawn dish washing soap... Sanding only moves the wax around. Once clean, use a non-wax polymer sealant such as Meguiar's machine glaze.

So Naptha, Then wet sand? No wet sand
or 3M Superduty? Then use Megular's Machine glaze.
No Wax?

Chuck,

You shouldn't need to wet sand or even heavy compound. After cleaning the wax off you might want to use 3M Finess-It, then the Meguiar's Machine glaze. Wax is old technology...

Chanse, you got a pic of how bad thew swirls are?
If they were created with one of your lower grit sandpapers, you may need to get back in the paper, but hopefully not.

Another good compound is 3M Imperial. Imperial starts out aggressive and breaks down to a finer grit with use.