Selkirk Power Air S2

Selkirk Power Air S2
Retail for $250
Brought it for my little brother and he used it for about a month and a half and got a small dent in the middle on one of the side (paddle tapped another paddle during a skirmish).
I tried to sand it down and put some paint on it to smooth it out but it doesn''t stick. Other than that, it''s fine. It could use an overgrip.