shep28

iTrader: (4)

I am helping a neighbor fix some dents on his beater. We mixed the bondo and hardener and let sit over night. When we went to sand, the bondo was not hard. It had a rubbery consistency and kind of gummed up when we sanded it.

I have never used bondo. What caused this problem?

Camaro477

what kind of bondo did you use, how much hardner? Make sure you mix it up good. Thats a big thing. I think that is possibly your problem.

ajd971

I would bet not enough hardner.

shep28

iTrader: (4)

I will strip it off and mix up a new batch tomorrow and then reapply.

01 Red WS6

iTrader: (4)

I don't think you used enough hardner.. What color is the bondo now?

Y2K SS

iTrader: (1)

I KNOW you didnt use enough hardener. lolol. For about a 5" x 5" pile of bondo you need to use about a 4" line of the hardener.

BigSmallBlck2GZ

rule of thumb for bondo....pea size amount of hardner for a apple size amount of bondo and make sure you fold it over and over, dont stir it............if you put to much hardner, u jus will loose out on play time with it, so dont be scared of using more hardner..............

Camaro477

doesn't really matter if you stir it or not as long as you get it mixed up.

BigSmallBlck2GZ

some people say ya to stirin, others say na, jus cause you get air bubbles and of course those will be pits after it drys and you sand it....whatever works for you, do it........

1998TA__1991RS

iTrader: (23)

do not stir it, it will trap air in the bondo and cause the paint to cave in after time