You have a different error one side to the other. :think:
Have you looked to see in what way they differ on your paintlayer as this is unusual.
I could be that the error is only a fraction of how it appears.....but if you can get one side you should be able to get the other :think:
There seems to be something similar at the back beneath the rudder where one side is differnt to the other.
I tend to paint one side and copy and reposition for the other.
That way both sides are identical.

OK that won't work with cammo but for symetrical paint it's the best way.
I also notice Steve's posts about setting brushes and suggesting I can help you with PSP.9
I can't help you with PSP as I don't use it, although I do have PSP.8..............but many here do
I use ARC and Photoshop . It might help though if I knew quite what you had planned to use that for as effects will not repeat in an ordinary fashion but be local to the area.

Garry