In the interest of not doing unnecessary work (I know, more of my Autopian Heresies, huh?) I'd try merely refreshing the wax from time to time. Seems to work fine for me, at least for a while. If I thought that the appearance would truly benefit from an application of #5/#7/etc. I'd probably do it, but just gently claying (Sonus green, not hard enough to remove existing LSP) and redoing the wax seems to be enough. I'd rather do the claying to make sure there aren't any contaminants sealed under the fresh wax than use the glaze/pure polish myself but it could be a toss up.