[silentbob]

Alright, once I find a time machine, I'll ask you for suggestions on which one

I think the point he was making is that the carbon piece will cover the scratches so you won't have to repair them.

As for scratching the whole tank. You have 2 options depending on the look you want.

1. hit the whole tank with a grinder and clear coat over it.

2. ride the bike off road and lay it down a few times in the sand.

 

[silentbob]

Ahhh, gotcha.

Hmmm, I like number 2.

I'm looking for random, but with a sense of direction, like if you could make the scratches resemble the way shaggy hair goes. What would the grinder look like? Also, what is the clear coat for?

What about some super rough steel wool?

This isn't the best example, but if you look at the side of the tank and the fender you can see where they used a grinder and then clear coated over it. You can make the pattern as coarse or fine as you like. The clear coat keeps it from rusting.

http://www.fremontcycle.com/bikes/photos/motorcycle_022.jpg