I don't think tear out is too much of a problem on a round over bit - it's more burning, which is easily cleaned up with some sanding. What are you working on? Guitar related? Huh, huh?
I should have been more specific as I was thinking about having to route across the grain (end grain) but didn't say so in my last post.
I've seen videos about the climb cutting (and another similar technique called bump cutting). I did some more playing around today and have a better idea on how to go about what I want.

As for the project, not a guitar but a 1 x12 pine speaker cabinet. I'm still waiting on a couple of bits & pieces, but will post the progress once it's started.