I part-time at my friends auto garage where we paint and do bodywork for a lot of cars and custom customer projects.
What you're referring to the protective lacquer is most likely simple clear coat. It is also a possibility
that they may be painted on the frame itself (can't tell due to the picture you provided).
If it's a sticker that has been cleared over, there's no possible way you can
remove it without removing the coat first. I would just leave it if I were
you because your bike looks good as is.
But if you really REALLY wanted to, you can try grabbing some sand paper, around 890/1000 grit,
and gently start wet sanding the areas to the point where you can access the sticker and
peel it off (again, that's if it IS a sticker). If successful, you can try to ask a local body
shop to use their rubbing compound + their buffer to buff it out and make that spot shiny
again and not dulled out from the sanding.This shouldn't ruin that section of bike where the
sticker sat on because it was on TOP of the color paint.