My old 1985 yz250 looks pretty good these days with new grips, handlebars, cables, barkbusters and rear mudguard however its got a front mudguard from an RM so its yellow. I'd like to paint it white if possible and have been trying a few practise goes on some yellow plastic but I just can't stop it from either running or bubbling, is there an easy way to do it without it bubbling and looking nice a smooth however it doesn't have to be shiny and perfect just a nice smooth surface that doesn't have any ugly bubbles, cracks etc on it. Or would it just be a lot easier and cheaper to get a new or like new mudguard? Also the fuel tank is looking a little dirty on the lower half and so far I havn't been able to clean it up much using both steel wool and heavy duty truck cleaner (although its great for removing scratches). Any suggestions?