Were you using enamel for this? If so, then you must have had to let each enamel coat dry for quite some time before sanding?
Did you actually "wet" sand? 400 grit, or finer?
I have the dewshield out in the sun today (already dry to touch). In my discouraging mood, I had a spell of "oh, go ahead, what do you have to lose", and sponged water over the dewshield. I figured that perhaps the finish would even out better - (water intensifies sun??!!). Now, as I looked at the wet surface, I noticed that the finish looked more like smooth professional surface (~like the inside surface of a conch shell). So, is THIS the way enamelled tubes looks so smooth? By using a clear coat (~like water) over top coat color? Is it that enamel, by itself without a clear coat, doesn't have an absolutely glassy surface finish?
I painted just yesterday. According to the directions on the spary can, if additional coats aren't done within 1 hour, then you have to wait 5 days. So,,,I can apply a clear coat directly over this enamel, no prep required, in 5 days?
As for oven baking, it won't work for me. Scope in question is a long focus 4 inch.