Well man I used 320 and 140 grit sand paper I sanded them for a while so they were nice a rough. I recommend you use Krylon Fusion as well as Krylon clear coat to make them look shiny. If you don't know hot to take the logos off I will be glad to assist. Well I will tell you anyway, the front logo you need to tale off the whole front bumper. I have a diagram if you need it, it also has 6 clips that you just pop out it's very easy. The rear Mazda logo is 2 prongs and glue use a heat gun to heat it up real good and it will come right off. The mazdaspeed is just prongs if pops right out. The 3 and I guess the 2.3 are glue so again use the heat gun. It's a progress just take your time and it will turn out very well.