Hello, I am now planning to treat my rock impact grating on the bonnet at the end of the week. I was advised to tackle the problem with rust converter. The day before yesterday I had taken the rust converter from Hammerite (can still be changed) and wanted to ask how I should proceed now. My thought was: sand off the rust spot with lubricating gel paper. Then let the rust converter on it and dry out. Now my question is: If you make the rust converter again and then make primer on it or can you just paint over it with the paint pen via the Hammerite rust converter? Because on the package it doesn’t matter that there is a primer in it. Would I be happy for advice. MfG, Ivo.