Rob Clayhill
+1y
u gotta take your time on every part man, it seems simple but it takes much longer than expected to learn how to do all of this especially teaching yourself hands on to make things turn out good. lots of different things are required to make the job go smooth, you need a long board sander and i usually start with 80 grit paper to knock down the first coat of kitty hair (fiberglass resin) then i add body filler and knock that down with 80grit as well till it gets pretty smooth then when u cant feel any big imperfections i start using 120 then when its pretty smooth i finish it off with 220 then add a coat of metal glaze and smooth that out. i have taught myself most everything i know, it may not be the way of the professional but it works good for me and it always ends up with good results. make sure you go very slow when tack welding the filler panels cuz it will warp very easily, also when you grind it will warp even easier if your not careful.
if you need anymore help feel free to send an IM.