My comment about cleaning the bike was not intended to indicate any thing was wrong, just noticed some grease in the corners is all. Turns out some of that was shadows I think.
I have never used Rub n Buff. I don't know what it is. I have heard various theories but still don't know. It does look good. I have been amazed at the look it achieves. You say you think it is "wax". Maybe. I would hope so actually. What I have heard is it is paint. That may be not so good but time will tell. It has been around for awhile and I have never seen a report of somebody that put it on 4 or 5 years ago and what their experience was at that point.
I wash my bike once a year. I spray it with WD-40 sometimes. I clean and wax individual parts when I have them off. I would like to have some nicer looking spokes but the wheels don't look to bad if I put a few hours into them.
Your build is impressive. It is a lot of work.