Clean clean clean. Vacuum, degreasing cleaners, and isopropyl alcohol. I took a wire brush to slight rust spots. Easy to cut. You will need lots of blades, I suggest getting a knife with snap off blades. Get multiple size width rollers. Take your time, and lay out in small sections. Pre fit and cut out any screws, nuts, bolts, plugs you may need access to in future before removing back paper. Most important wear thin gloves because the foil is sharp and you will contribute sweat, blood and tearsSee full review