Originally Posted by
Mike_Kelly
As mentioned above be aware that there are two kinds of "decals". The modern "decals" are actually vinyl stickers, which are easy to apply, and they have a significant thickness to them. If you try to clear coat over them there will be a noticeable bump-raised area on the stickers. Traditional decals where much thinner and much harder to find and to apply but they can be clear coated with no raised area.
Gus Salmon makes real traditional decals when the other sources make vinyl stickers.
I was looking his page and seems to be good quality, water transfer decals.
But I don't know what is the best option, if clear coat after apply decals or not to clear coated. I think originals decals of all vintage bicycles aren't clear coated