I have damaged the finish on my frame by using an ill-fitting BB tool. There are 3 areas on the bottom bracket shell, 2 underneath and 1 on top. The finish is a textured matt black anodising on a 7005 T6 alloy frame. I have rubbed down the areas ready for painting as shown in the photos.
My research has suggested I need an etching primer, although I don’t know what effect it may have on the surrounding anodising. I had hoped to use a brush rather than spray but this I understand is not advised as you need a thin layer which is difficult to control with a brush.
As for the top coat, I’m not sure if matte or satin will be the better match and there’s so many different types of paint I don’t know where to start. I’m not expecting a professional finish, just a hard wearing one.
I also need advice on masking tape as I don’t want paint on the face of the BB shell.
Thanks, Mark