For those of you who paint in oil, how do you store old paintings? I painted on gallery-wrapped canvases and continue the painting on the sides of the canvases (That way, a client can just hang the piece, if they don't want to purchase a frame for it). Since I sell my paintings at art shows/craft fairs and I have 8 shows coming up this fall (including a gallery showing in the winter), I need a location to store my inventory for the shows. This means that I've got a lot more paintings that won't fit on my walls.
Now, the paintings that I would store are already varnished. My basic procedure is to do the painting, lay it flat for a couple of weeks (so that it get's to the dried/tacky state), then hang it on my wall to finish the drying process. After 4 - 6 months, I then varnish it (I use thin layers).