Thanks guys for your encouraging comments.
In my quest to find and purchase a burnishing tool over the internet, I came across an oddly suitable substitute...crochet sewing hooks. The set I bought is made of bamboo sized from 3.5mm to 10mm. They are perfect for removing the stepped edges of mating sections, forming rounded nose cones or even shaping missile or bomb cylindrical sections. Who knows, if I ever get bored of this hobby I can always use them to start crocheting a blanket
