Hi im thinking of putting bondo on my car and was wondering if done professionally would it crack over time?

 

If it's done professionally, they will most likely not use the brand "Bondo" but will use a pro brand. And, if done professionally, they will only use it with a very thin layer, then sand most of that off. So, the chances of it cracking over time are minimal at best.

 

if bondo is used thin on a small area with proper prep work it will be fine. but i wouldnt use it to fill a dent or anything like that. its made to just fill in minor inperfections. if what u need to d isnt that bad you could use high build primer. it is a little thicker than regular primer and with a few coats it gets thick