Macattack64 said:
Don't go with the shirt Idea... Find a mask like this:
Link
Or this one:
Link
This is atleast... A respirator would be better, but I didn't... I'm not suggesting that you shouldn't but if you work outside you should be fine with one of those masks...
I agree with Mac the "Painters Mask" is a good cheap alternative to a respirator. We used to use they all the time in the body shop I worked in and would just throw them away once done.
Always make sure your in a well ventilated area when Fiberglassing, IE: Outside or in a Garage with the doors open, if you start getting lightheaded walk outside "DONT RUN" running increases the blood flow and allows the fumes from the Fiberglass to get into your system quicker. Walk outside put your arms above your head and take a few deep breaths.
If after about 10 - 15 mins you still feel lightheaded and/or dizzy you need to contact poison control services immediately.
Fiberglass is decently easy to work with but you just need to follow the simple safety practices and you will be fine. I have seen way to many people that I worked with end up in the hospital because they didnt want to stop working for 10 mins and go outside.
ALSO "I know im rambling sorry lol" Another little piece of advice when useing Fiberglass: When your using the cloth there are little fibers that usually end up getting on your arms and stuff and is VERY itchy. If this does happen be sure to take a COLD shower to get them off. COLD! not HOT not WARM but COLD! I cannot stress this enough. If you take a Hot or Warm shower you open the pores in your skin allowing the fibers to get in and once they are in it with Itch bad for the next couple days until your body naturally forces them out.
This happened to me for a solid month when I first started at the bodyshop it wasnt until I asked one of the guys that had been there for a while that I realized what I was doing wrong.
Good Luck!