Like I said in your other Sisu post, "I'm beginning to like these 1/32 scales a lot". They look nice and are easy to work with and take up less space. About storing them, why not display them in that bookshelf you have and instead store the books?
For touch ups, I spray a little paint inside a plastic cup and apply the collected paint with a small brush. I do the same with the clear. I only use spray cans.
I use mostly flat colors. They are much easier to apply. I then put two or three coats of clear. For dark colors I use Testors High Gloss enamel. For lighter colors I use Testors Wet Look lacquer or just Clear. I don't buff or sand. If I did the results would be better. The truck you see in my Avatar was done with flat green. Click the Avatar to see a bigger image.