Hi Trig.....regret I'm no expert on these paints.If your seats have been painted,I have no idea if you can paint over that.I have only ever used Vinylcote ,which dyes them rather than paints them.I guess if they have been vinylcoted then you can do that again and simply dye them another colour.I have no idea if you can paint over paint...if you see what I mean. I was thinking ,if you wanted to return the seats to original,I could offer some already blue bits and the rest another colour,which you could then dye blue to match.I know Vinylcote went bust,but Woolies do it now,and it works well. If you want to keep the front seats,I would suggest trying perhaps some thinners and see if the 'paint' comes off...then you could get it all off and repaint it.If its dye...it shouldn't come off and can be dyed again.