stang_killa94

Ok so im about to use the bondo for the first time and i just had a question. Should i go overboard with the layers or should i only put what is needed? Let me try and it explain it better..........do i put x amount of bondo so that its covers what i need to cover and then some so that there is more
bondo over what i want to cover or should i try and keep it to the perfect amount? If that makes any sense.

L44

no dont use more then needed, bondo is weird as hell and likes to crack easily when too much is applied, use the needed amount then drag it out until its smooth, use the cheese grater tool to get extra off, then sand it out feathering the edges

95 3.8

but you need to layer it, with several thin coats, one after the one before dries. not just one big one. and then some more, then you sand it off to a feather edge. but the trick is to do several layers.

lownslocamaro

Alright, so your part is grinded down with 36 grit scratches, feathered with 80 right? If it is all 80 grit scratches that will work too, but I prefer 36 grit so it really bites. Lay a nice thick layer across pushing on the spreader so it fills all the voids with the least amount of pinholes. Lay it on, it should be a little higher than the entire part, lay it on thick. Once it starts to cure, you can take your cheesegrater, also called a rasp, and start cutting it down to the correct shape, then, let it fully harden, and block it down with some 80. If you half to add more, add more, it should feel perfectly strait when you are done with it, and btw, run your hand across it while looking the other way and feel for straitness, you can't see it with your eye. It will not crack in that application. You can put it on 3 inches thick and it won't crack for quite some time unless it is in a vibration/heat prone environment. Modern body fillers are plastic, and we all know the wonders of plastics.

stang_killa94

thanks guys exactly what i wanted to know.

Another quick question.......How long should i let the primer set for until i apply the paint?

L44

kind of a vague question, theres too many different primers and variable conditions to even give you a straight answer, moisture and the type of primer being the biggest factors, if you wanna be safe...24 hours that way you know its cured, but to be honest 2-3 hours in a paintbooth with spies hecker regular primer, now they got a UV primer which you blast the area with a UV light an it dries completely in 20 seconds!