When I've done something similar in the past once the two parts were welded together I drilled a small hole all the way through both from one side to...
Steve's old car, my blue one was originally flocked on the canopy and window tunnel. It is a good choice for items like the canopy that has may sharp...
My blue Nova has the water jet tube run up through the inside of the canopy hinge arms along with the wiper motor wires. I've not faced an issue with...