Squelchtone wrote:So folding a square of 400 or 600 grit sand paper with the rough parts in and the soft side out and putting it in my wallet next to my credit cards is not a good idea?
Correct. That is a very bad idea. With the rough side folded against itself it can wear itself out by simply rubbing against itself. It can also fall out of your wallet easily if the rough side is folded in.
The proper way is to fold the paper with the rough side out, preferably between the back sides of 2 credit cards. This way the rough side will not wear off the numbers on the front of your cards as you slide them in and out of your wallet and the friction will also help keep the paper from falling out of your wallet.
I hope that clears this up for you.
