Well, the mufflers were painted before install, so all I painted on the car was piping. That was easy to control, so I didn't tape anything off. Would I recommend it? It just depends on what look you want. If you want a black finish instead of rust, then yeah, do it. My TL-S mufflers were black to start with, but some of the paint had come off (like almost every Honda muffler...esp V6) so I wanted to paint it to make it look better, and I like black because I don't like the look of hanging exhausts in the back.

I'm sure the painting also has some rust corrosion protection, I dunno if it makes a big difference though.

And does it look like I could get under my car without if being jacked up?

Just playing...yeah I jacked it at the rear. You could maybe paint some of the pipe with the car on the ground, but you couldn't do a great job, ya know?

I like the all black exhaust look for my car.
Here's a better shot from the rear: