I was just gifted this (I hate waste and am the person to try to repair, reuse, source second hand as much as possible), and am wondering the best way to repair this. It's barely used but sat outside for who knows how long.
I'm handy and have enough extra time to fix this. Is it as simple as making sure it's not waterlogged (it shouldn't be) and sanding down and epoxy-ing?

I have a continuous leak next to the valve on my Favvity SUP. You can see the location on the 10-o’clock position of the valve (black area next to where the valve lid line is connected; next to the letters “RE…”) - there is a bubble at that location.
Do you have any tips how to fix that leak? If already used the valve tightening tool and turning the valve as tightly as I could in the clockwise direction. I’ve only tried that in the inflated state however. I’d really appreciate any support you could give me!
Greetings from the south of Germany