I've done custom motorcycle tanks and seats for cafe style bikes in the past just using fiberglass and bondo and never seem to really have a problem.. I'm no pro by any means, just a fun hobby I've enjoyed. But now that I got my hands on a Vela rossa I really want to be sure I'm not going to be hurting myself in the long run.
The kit is fully mounted and frame reinforced (convertible), so all the hard work is done. Kit was done well and lines up for the most part. Where the top of the rear fender and the door meet sat up quite a bit too high so I worked it down to get it more level with the door, looks great but the glass did get thin in few spots with some small holes. I've figerglassed under the holes and was just going to do a few thin layers of bondo to smooth it out.
The hood is also slightly off near the doors. It looks like I can level it all out, so I put a single layer of fiberglass down and again was just going to build with a 2-3 thin layers of bondo and sand it all smooth.
I've had success on motorcycle seats and such, but its only been about 2-3 years. Will this all start cracking and falling apart on me in 5 years? Is there a better way to build up these areas a bit other than fiberglass and thin layers of body filler?