I noticed a few days back that the upper portion of my driver side back wheel has got rust. I took a sand paper and started cleaning it hoping to remove the rust and apply primer-paint on it but as I started sanding it, it got worse - something started coming off! I am not sure if this was the metal or the paint so I sprayed it with some primer and applied some spray paint. I should have taken the picture before spraying it but I panicked!
I was checking online to see how to fix this Rust Stop Paint. It says I need to sand the rust off but when do I know how to stop sanding? When I kept sanding, I thought the metal was just falling down in pieces. The more I was sanding it, the more it kept falling down so I stopped after a while thinking that I would destroy it completely.
Currently, I am seeing two products, one called the Rust Paint and the other called the Bondo Putty and am not sure which one to use for this purpose. Would anyone have some advice?