I've had canopies fracture at the point where it contacts the fuselage. You get that little crack at the back or front from vibration over time. so I started cutting a little notch for the canopy to fit in. I glue it down into the notch with either epoxy or canopy glue. Once dry, I tape off and put a fillet all the way around with SuperFil or sometime micro-balloons and epoxy (depends on the application) then sand the fillet down flush with the fuselage and canopy. When you tape off and paint, the joint disappears entirely.
In a situation where the fuse is already finished (like yours), you need a near perfect fit of the canopy and canopy glue will probably be OK, but will be susceptible to fractures at the front and the back from vibration.