Yay, I love the paintinator. :)
Do the bullet holes stay on the wall forever?
They're not bullet holes, they're paint splats, and no, they fade away after a while
The paint splats are glitchy, they can only be seen from a certain view, like if you shoot the floor, you gotta jet/jump up and look all the way down on it, there are other certain views to see it though, this is a problem i can't fix, unfortunately
The paint splats only show up on interiors and i guess terrain, though i've never tried