If it scratches the tank its really, nothing you cannot get out with 1000 Grit wet and some good polish. Standard detailing trick.The scratches probably would not even be deep enough to need the sand paper.

 

step 1 convert iphone to induction charging
http://lifehacker.com/5923977/mod-yo...-case-required

step 1 bolt induction charger into dash console. (still looking for a nice thin one to bolt into the fatbob extended dash)