Alright, here is another tutorial (I guess it's a branch off of the helmet one):
Bondoing 101 
Alright, start with these:
Bondo
Hardener
Applying tool (refered to as the BAT; Bondo Applicator Tool)
[ATTACH=full]107903[/ATTACH]
[ATTACH=full]107904[/ATTACH]
[ATTACH=full]107905[/ATTACH]
Then, you take a small-ish amount of bondo (I use about a golfball sized amount)
[ATTACH=full]107906[/ATTACH]
Add the required amount of hardener (read the bondo can label...I never use the right amount so I dont know what it is...
)
[ATTACH=full]107907[/ATTACH]
Stir THOROUGHLY...
[ATTACH=full]107908[/ATTACH]
Then, using the BAT, apply the bondo to your construction in a spreading motion, leaving a thin, mostly even coat:
[ATTACH=full]107909[/ATTACH]
[ATTACH=full]107910[/ATTACH]
And then your done!!!
repeat process until you get a nice, even coat over the entire helmet. Hope this helps guys!
:cheers
A'den