Easier to add more and cut it back to where i need it than continually add a little at a time. For me, it's easier to shave or sand out the shape I want than it is to build it exactly right. Your lungs are worth the $30 respirator or mask.īut I used a gallon of the bondo over two separate builds, plus odds and ends for other projects. The real stuff stings my eyes, and I ALWAYS wear my respirator with that stuff. We have a place called Benny's here in Rhode Island that has something like 'Car Max' brand or somesuch, and it's about half as much as bondo, and I swear both the paste and the resin put off about half as much vapor as the proper bondo version. Click to expand.I used a gallon kit I bought.