THIS IS WAT IVE DUN SO FAR, I REALY HATE THE MASK CUZ I CANT USE BONDO WURTH A FLIP, AND THE VEST JUST NEEDS TO BE WEATHERD AND GET TH NECK GUARD ON IT.
a tip for using body filler.. work in small batches and also layers, to get the over hang on the face.. when is starts to harden and you see it start to bobble STOP and wait for it to harden before putting any more on. its easier to layer and use the scraper to smooth than it is to sand flat..
also once you are reasonably happy with your shape mix in some fibre glass resin 1:1 ratio and use a brush to paint on this will give you allot smoother surface to start your sanding on .