Yeah, I don't like it when older sailor moon gk's have the eves sculpted too, for example, this one also has funny looking eyes [link] I would just putty the eyes and then just paint over an even surface with no more eyes XD
I'm only saying what I honestly thing. I've never actually quite understood what a "garage kit" is. They provide you with pieces in rough shapes, but it is still up to you to refine and paint them, right? But I'm sure even this is not easy.
Yes it's quite that. You have different pieces, and on those you have to take off some "keys" (because at first it's a sculpture that is put in a mold to get different casting). So you have to clean it up, put it together, check and glue parts and of course paint it. I think, if i'm not wrong that wikipedia explain it quite well.
I don't think much explanation is needed beyond what you've already said and what I already vaguely know, but I'm also sure that just hearing how it works will make it seem easier so you do deserve credit for all of the detail.