I sanded all the sharp edges everywhere and CA'd them all. I paid extra attention on the battery slots and the places where you would use tape to hold the battery in. I even did a light sanding on the tape slots after I CA'd them. I don't use the battery strap that came with car because of the shortness of the hold down screws. Even with them installed per the manual they seem kind of short for my liking. Sanding and sealing all the edges makes for a nicer looking finished product.