This is the dreaded Tower of Yahg'rt, my first terrain piece and the site of many a PC's humbling experience.  I think that the primary mistake on this one is that the %$#@ thing has no windows.  Insert appropriate Linux witticism here.
				A second scratchbuilt tower, built along similar lines, but without the companion hillock/berm thing and with windows.  This one taught me that spray sealer will react to Sculpey (what the doors and windows are made of) through two layers of spray paint and an equal amount of acrylic paint.  The result is that all the Sculpey parts get sticky and stay that way..  Ceramcoat matte sealer (PVA based) is tougher, dries flat, and does not share this liability - it can even be used to fix the aforementioned condition..