Originally Posted by alans
You can do it, but you will quickly find out if there are any blisters or air voids in your gel coat. If I were you I wouldn't do it if you are out of warranty.
If your gel coat is that bad I'd say it might have come off by now doing 45 across the lake? So long as you keep your presure washer a few inches away from the hull it will do a reasonable job of removing scum?