Verified answer

I've seen lazer engraved SLG's. Google your marker, and browse the images to see for yourself. They don't look half bad, actually.

Kohn knows what they're doing, as you can see in their gallery. Check out some of their work, and look at other markers with curves in the bodies - Kohn follows the curves and doesn't distort the image. It'll look fine on your SLG.

I'm kinda with the previous poster, though. Paying to have an SLG engraved isn't the best investment. But i've seen people engrave Azodin markers, and those are technically a step below SLG's, so it really depends on what YOU feel is worth doing.

You can, but it would be useless to dump money into it. Unless it's a highend marker I would use that money to play or something else. You could get an extra tank, extra hopper, maybe a cheap backup.