Hello Hope someone could advise how to go about repairing some damage caused to my Golf. Someone sadly was very careless and instead of making sure there was enough space to move, decided to instead scrape my front offside corner scraping part of the bumper.

Thankfully most of the damage was caused to the front bumper mould and some light grazing to the main bumper which i think I can get away with with some polishing. How to go about doing the mould? I couldnt find any coloured moulds on eBay, but found a new primed one. I know my colour is LA7T, United Grey, and I have found a spray and lacquer. Do I need to sand the new mould first, then apply the paint then apply the lacquer? What is the best way to go about it? Could anyone kindly advise? Thanks in advance.