door enclosure

Hi I am currently making a door enclosure and I'm wondering how many layers of glass are adequate? and do they make a spray alternative to bondo, just curious.

you will need a coupl layers of mat on the project, it depends on the thickness of the mat and the amount of curves to the panel. i would say if you use the average 1.5 oz chop mat and it is not that curvy you should be ok with 4 layers on top of your mold fabric. with the spray bondo......yes and no. they make a thick filing primer that you can build as thick as you need, but you will still need to use duraglass/marglass first as a base filler(very strong fiberglass reinforced filler) then body filler, then fiather fill( polyester primer) the primre will be really hard yet easy to sand. you can build it to 1/8th of an inch thick or more. it will fill in 36 grit sanding scratches so no real need to sand much finer than that.

Hey Rick check out this www.apline-usa.com , they have a demo vehicle with some very detailed domentation on glassin door panel.  It really help me come up with ideas for my truck.