I learned a very valuable lesson. DO NOT CLEAR COAT RUB N BUFF!!! It dulls down the colour quite a bit, and you lose the shine. I attempted to sand through the clear coat to expose the brass layer, and i ended up sanding right down to the primer. This resulted in sanding down the whole gun back to primer, well, as much as I could. Because of all the nooks and crannies, the sanding job is awful and it shows. I have since repainted the black and started adding rub n buff as a top layer. I'm going to have to weather the gun quite a bit to hide the sanding job underneath. But, I was going to do that anyway. So I do suggest adding the brass colour last.