I'm going to try out Dr Color chip to cover a few small rock chips on the hood and bumper of my truck. There are a few that have slight surface rust forming on the exposed metal. They are way too small to use a sanding pen to remove the rust prior to filling with paint so my thought was to use a rust converter with a tooth pick or something to convert the rust then fill with the paint. What are guys opinions on doing this or if someone has any other opinions let me know. I don't want to be causing more damage than good. I have a bottle of rustoleum rust reformer that is supposed to chemically convert the rust and give a paint-able surface after application. I had good luck using it on a rusty lq9 motor in my old truck before spraying it with engine enamel but wondered how it would do as a primer for the dr colorchip paint.