Good alternative to bondo, apparently. 

Here is a visual example of what to do before bondo:

This is good advice if you don’t want to buy chrome or any paint and want a decent shine on your helmet. I’m sure it works for both helmets as well. :]

Visor help from the forums. :]

Help with fiberglass~ (from the forums of course)

Help for making the visor and the LED for Thomas’s helmet (from the forums)

Sanding and primer help (from the forums) 

Vacuum forming information (in case you wanted to make Guy’s helmet too). :]

Another alternative to bondo I suppose, haven’t tried it myself, but could work: “1/2 cup of plaster of paris with 5 tbsps of resin, a small amount of water and catalyze w/e 5 CC = instant bondo putty.”

Steps in forming everything using the baseball helmet. Good advice. 

Progress of other user from the forums; pretty good visuals if you are using luchofunk’s files. :]

A quick overview of steps haha
Its for Guy’s helmet but applies to Thomas’s helmet too. :]

Bondo Help

Help in creating the gloves. (from the forums)