I know this has nothing to do with a fiberglass alternative but apparently I have everything I need except the fiberglass. I was going through our tool box and found safety goggles and a respirator. I wtfed as soon as i saw it an. Also is spray paint toxic enough to where u need a respirator cuz if not then my parents or should I say my dad is too strict to let me use it while alone
Just to make sure we're all talking about the same stuff here, this is fibreglass:
Note that it's solid and does not significantly hurt you unless you start cutting it and inhale the particles.
Also, I still don't think there's any harm in letting somebody help you. If you need the help then it'll benefit your model, and if not, you can prove that and possibly work alone in the future.
smoothcast 321&320 [...] in the vid i watched a while back he said you can even do it indoors(workshop etc).
Polyurethane resins ARE harmful by inhalation and Smooth-On's MSDS for Smoothcast 320/321/322 suggests using respirators. Of course, it says "[use] if ventilation is not sufficient", but unless you have some kind of exahust system installed, there will not be sufficient ventilation to stay below the permitted exposure level.
But you do have a respirator now so if your parents are still cool, buy some filters for it to be sure it's still working!
Getting new filters is a very good idea, because these things start to die once unpacked, even while not in use. Also can't hurt to have spare filters around.
You should also use that respirator for spray painting (would be stupid not to when it's lying around anyways). To do so, you'll need filters for both organic vapours
and particles. If it's a 3M mask, you can probably attach particle filters to the cartridges with special plastic brackets.