Yup, provided you trim the bottom of the guardian torso flat to fit on the glade rider's legs. I guess they'd fit on pegasi better than these cold ones, too. The bits work nicely with one another provided you don't overdo it.
Haven't tried the Fusion, but since it's made for plastics I imagine it would be pretty good. Thought about picking up a can the last time I was getting primer, but went with the Krylon gray that I'm used to.