I am more of a collector than a builder and to me, the most critical part of cleanliness on a model is the paint, usually when that is done right, everything else pretty much falls into place. One of my favorite builders here is Cruz, his paintjobs and the way he approaches his builds are always unique, I know, I own 3 of his builds. I do see a lot of cool paintjobs here but some seem to be a little on the thick side, I think that the mastering of polishing kits are a must if you want to be more than just an average builder.