is there a trick to bondo? the issue im having is where im putting it on and than sanding it seems as if the bondo is crumbling like it will sand smooth but in areas it will be pitted and have holes and in some areas it will be smooth. i go back over it with a smooth coat of bondo and let it dry and sand again and the same crap? am i not mixing it right or what am i doing wrong or does bondo just flat out suck? im using it to finnish off some of the lines on my car like where the side skirts meet the fenders and stuff like that. thanks in advance
joe

I'm no where near an expert on body work, but it sounds like you might be mixing it a little to much, thus getting more air pockets in there when you apply it.

your over hardening it . a good trick to mixing it is to put a small line of hardener across the diameter of bondo your mixing .do not just mix it either . you have to keep like folding it and mashing it till its one color .

got ya yeah i figured i was doing that wrong i was mixing it like pancake batter only thicker lol, ill give that a try
joe

Peace,
The statements regardin' the amount of hardner and the way you mix it is tru, but it can also be the quality of the bondo itself... The type from Wal-Mart for instance isn't good... Check this out... I was given this link from optikal... I purchased it, I haven't had the time to use it yet, but this is Official quality... Somewhat pricey and may not interest you because of what you're usin' it for, but if you want the quality, this is it...

http://www.autotoolmart.com/cgi-bin/webc.cgi/st_prod.html?p_prodid=10886&p_catid=63


Peace,
Jem

i got the expensive stuff its blue and like some ultimate crap or something sappose to be like super light weight?? i dont know i just wanted to fill in where my skirts meet my fenders give it that finnished 1 piece look ya know. anyway i did what was posted before and so far so good i got a good clean smooth surface at 3 points all i have to do is work on the 4th and im good to go but thanks for the imput
joe

Originally posted by joeck76
i got the expensive stuff its blue and like some ultimate crap or something sappose to be like super light weight?? i dont know i just wanted to fill in where my skirts meet my fenders give it that finnished 1 piece look ya know. anyway i did what was posted before and so far so good i got a good clean smooth surface at 3 points all i have to do is work on the 4th and im good to go but thanks for the imput joe

you should be using just lightweight bondo for that . you should use fiberglass reinforced filer . then bondo or polyester glazing putty

you know its funny you mentioned that because when i couldnt get it to smooth out compleetly i used some bondo glazing putty and now its smooth as a babys azz, that stuff works alot better at filling in. thanks
joe

the seam will crack out unless you glued the sideskirt to the fender with duramix or fusor or any other of a number of autobody adhesives. after it's glued you want to use a fiberglass reinforced filler like mar-glass and THEN do your bondo work on top of that.

how about liquid nails? when i originally put them on i never intended on taking them off and used liquid nails at the seams, seemed to hold pretty well, if not than i think it might be back to the drawing board, thanks for the help though.

i would use fusor 142 . i dont think liquid nail will hold up

yea I don't know about the liquid nails. my kit is molded using UPOL 904 adhesive which is the equivalent to the fusor and the duramix. it's been molded for a few years now with no cracking whatsoever. it is also what is holding my mr2 vents in the quarter's.

i guess i will have to take my chances the car is done now sanded and primed, everything is smooth and flawless i guess if i get cracks if nothing else i learned a little about body work and can do it better next time. thanks to everyone who replied
joe