I need help with identify what materials is this frame
I need to know if this is indeed aluminium? (weight 1.2 kg for 15 inch frame hybrid, is not ferromagnetic). If it is, why would it have a few green/white rust, especially at the weldings/joints?
What is the material that has yellow/bronze color outside the frame? Is it a primer? Or anodized?
I would really appreciate your help and knowledge on this matter. I would really want to paint it, but I have no idea which primer I need for this frame (aluminium or anodized...)
Disclaimer:From other question/answer (I did have a look) I guess it is aluminium, but then the rust and the color does not match Aluminium characteristics and therefore, I would like to ask.