The acrylic stuff, as you've already mentioned, is water based, I may be wrong but I'm pretty certain you have to use an acrylic sanding sealer too. I'm not sure that it's compatible with the cellulose stuff. The problem with water based finishes and sealers is that they raise the grain. Their main purpose is for use over the top of anything spirit based, such as line drawn picture, or staining, where to use a cellulose sealer or finish would remove the spirit based stuff underneath. In all honesty, although I have spray can of it, rather than a tin, I've never experimented with it on pens because of the fact that it's water based and also the drying time is longer.
