An update on the previous picture, both the correct biceps have had their exterior coat of resin, and I'm about 3/4 done with fibreglassing the forearms and the helmet, as I have to let some sections dry to avoid pulling away pieces I've laid down, or getting tangled up in overhanging fibreglass.
Which parts does everyone actually fibreglass? The forearms seem pretty strong even when they were only half fibreglassed, and they will be at least 100 grams each when done. I'm not sure exactly how the fibreglass adds strength, but I think it stops the card and resin from tearing or cracking, gives thickness to the layer of resin (Making it less bendy compared with no fibreglass) and acts as bracing struts if it "cuts" corners.
In short, some areas seem just as strong without the fibreglass but the same amount of resin, so it it possible for smaller pieces to just leave the fibreglass out?