Nothing to worry about. The tops aren't a veneer, it's an actual hunk of wood. You won't sand through it. For all intents and purposes, you can treat the body as if it were a solid piece of wood. The only caveat is that sometimes with clear/transparent finishes you can see the transition point around the perimeter of the body, which gives away the fact that it's either not solid or is a laminated part. But, that's can be looked at a different way - a chambered/hollow body is a Good Thing, desirable. It doesn't affect the tone much, if at all, but you lose about 25% of the body weight.
You can diminish or eliminate the appearance of that transition by doing a masked or actual binding, or you can do a "burst" finish that has dark edges. Or, you can ignore it - it's not like it's a defect or unattractive.