Nice particlewave. I did my rims in 68-72degree weather so it was cool. I only sanded one of my rims which had bubbled paint. I used 80 grit wet sand paper and worked some areas to metal to get a smooth surface. I did not do the whole rim as can be seen in the pictures just the parts that needed sanding. I recommend sanding noticeable imperfections on the rim before plastidiping to get a better result.