For years I have been using tape from the hardware store. Black sandpaper type or grey rubber type (which I wished was available in black). So I looked at McMaster Carr and, as usual, they have stuff. These are the #s for the three I ordered.
Closeups;
Clear. Not sure where to use this yet but I think it will be nice when I don't want to change the guns appearance w/ black tape. It is almost as aggressive as the hardware store black stair tape.
Black rubber. I like this because w/ a little heat it can be stretched slightly around corners. You can also squeeze down the edges so it is less likely to be peeled off accidently.
Aluminum backing. Not real sure what it may be used for but I wanted to see what it is. It is less aggresive (100-150 grit) than the hardware store stuff (60-80 grit)