I am building the Low Boom SST, and my kit's long motor tube is also not glassine coated. The tube will be invisible - all but 1/4" is inside the boattail and main body tube, and that exposed 1/4" will be covered by the threaded motor retainer - but it still struck me as odd.

I too have a BT-60 Nike Smoke in my collection. I'll have to look for an ugly brown "paper towel tube" on that one too!