Rage gold, which is the body filler most recommended on the FF site. Not a lot of places have it but found it at mourans paint at wetherill park. $42 for a 3.4 litre can.
Les, that tip with the hacksaw blade is possibly the single best body tip Ive come across - One run across with that formed a perfect smooth curve over the top of the front fender...brilliant!
RE the rolled edges. I still have some work to do but the basic shape is right and I think it makes a huge difference to the finish of the cockpit - as did a few fellas who dropped in the other day. I think some are planning the same mod.