I had a phase in the past of working in 2 halves, from the bar end and from the stem
I read your method described as being the very one used by Alex Singer on the Velo Orange blog
! They're also advocates of Shellac-ing.
I tried this recently and ended up a touch obsessed. Every variety I tried, however natural, turned white tape a disgusting brown, yellow, or at best, (excuse the description) light urine colour!!! (which is what I settled on!) I was told it may be a reaction to the acid in the glue on the tape but I'm not 100% convinced by that.
It actually feels okay though, just looks a bit dulled down, certainly spoils white tape. It also still gets dirty and doesn't clean up that well. But it does stop it getting quite so soaked in the rain. I now, as a result, also know all about artist quality shellac, amber shellac, clear shellac (it isn't!) and cloudy white french shellac... I guess useless knowledge is always the minimum win from experimenting!
So, if anyone really wants to try some, I could probably post a jar of some clear or amber! I think it goes off though, but is fairly recently bought so might be okay.