Painting a scope?!

Like the title says…

I occasionally see “gloss” versions of the “matte” scope that I want.

I don’t want a “gloss” scope on my rifle, so I’m thinking that I could buy it and then de-grease it and then spraypaint it matte grey or black.

Of course I’d cover the lenses well, and the turret caps seem to seal airtight (there are rubber o-rings).

Is there any reason that this wouldn’t work?

Nope,
i do it all the time bro. Just tape off anything you dont want covered,protect the glass and have at it.