Just had an idea for teh radious, buy the sanding sponge. You can get them at wall mart or the hardware store. they will contour around and not take off the original shape. Probably the best option. I would just get it blended in with the top and bottom, then as long as you have scuffed the existing paint, you can just shoot over it.
OH remember lots of thin coats are better and less chance of runs. first coat should be a dust coat then aapply a few thin coats.,,,WET SAND with 1000 grit, wipe down with tack cloth and do it till desired finish.
“Find your own sound. Dont be a second rateYngwie Malmsteen be a first rate you”
– George Lynch 2013 (Dokken, Lynchmob, KXM, Tooth & Nail etc....)