What if I try spraying a second coat on the body and see how it looks after that?, if there's no change I can always sand it back and then do the grain filling, still have some Maple Timbermate left, on the spray can it says to wait 30 minutes before spraying another coat, I've had another look at the body and I'm really liking the colour too, it's very similar to Lake Placid Blue, maybe a shade darker though, not 100% sure.
I think I know why the paint looks a bit patchy, from the looks of it, the patchyness appears to be due to the silver particles in the paint showing through due to me spraying a bit too lightly in places, on the can it says to hold it from 15 to 25 cm away from the surface that's being painted, I also gave the can a good shake for three minutes before I started spraying.