making money from 3d printing?

[Davo]

If you don't like the lines, use thinner layers.

It's not that *I* don't like the lines, I mean I don't think anyone and not just me would be willing to buy an iphone case, a figure, etc. with even their design of choice because it will look so unfinished. And finishing methods I'm familiar with, sanding and acetone vapor from what I've seen won't improve it much (look like any other phone case or figure made with professional tools), not to mention I don't think sanding will work for rubbery filaments used more for things like phone cases.

Let me rephrase then: use thinner layers.