When I masked and painted the yellow stripes on the canopy handle, my masking job was evidently not perfect, so there were small areas of paint glitches along the boundary between the black and the yellow. Today, I used a hobby knife to trim off the overspray areas, then touched up a few other areas with a tiny paintbrush. Then I sanded the transitions with 2000-grit wet-dry sandpaper, and sprayed two coats of clearcoat.
This handle was a lot of extra work, between the bead-blasting, cutting, re-welding, powder-coating, masking, and painting... but overall, I think it looks pretty cool, and I'm very pleased with it. It looks like a proper emergency egress handle now.