Hi, when I bought my car a few months back I inherited some prior damage to both the front and rear bumpers. Having not done much paint repair I was wondering if I need to do anything specific. I assume for the big damage on the front bumper, t-cut and sand down a little around the damaged are areas, couple of layers and black with wet sand between coats (?) and then few layers of clear gloss? I'm worried that I won't be able to blend in to the original bumper? What about these scuffs on the rear, looks like they are just on the top(ish) layer so a couple of black coats and sand down?