Take it back and demand they tint your windows as an apology
Huh!
OP. that in my opinion, is water trapped under the decal, not air bubbles, and is now well beyond retrieval and wants removing asap, to avoid the adhesive having a "contact adhesive" effect. and attaching itself to the fresh paint, and as I've already said, increasing the risk of pulling off the paint! and only the naive think this can't happen!
The decal probably looked good when it was first fitted, but its likely that the water solution has sweated, and expanded upon the decal getting warm in the sunshine.
These decals are better to be fitted dry, the vinyl is quite forgiving, and can be pulled back and re layed into a better alignment position, without fear of tearing it. Air can then eliminated with the edge of the palm of your hand, and laying at the same time... no water to get trapped!
Normally these vinyls can be ordered from various sources, either with, or without the holes for washer jet and wiper, always order the version that has
no holes! trying to align the holes only adds to the problem, but holes can very easily be cut out after fitting,
New decals should be fitted 5mm above the swage line radius that runs the width of the tailgate, there are 2 reasons for this, first, it avoids disappointment when the glass is re fitted, and you can still see the colour of the paint between the rubber and the decal! And second, the edge of the vinyl doesn't sit happily on a radius of the swage...
Modern vinyls are far better than what was on offer 20 or so years ago, OE ones used to suffer from shrinkage, and turn brittle with exposure to UV, VW may have cut the vinyl in house, but it would have been supplied from a 3rd party company, so chances are, you are now buying a far superior product
Here's a pic of mine, I fitted it about 7 years ago, and is still in perfect condition, again, this decal was fitted "Dry", and the holes cut afterwards, I also would have left the vinyl to settle maybe a day or two to "settle" before fitting te wiper grommet and nut, lessening the chance of the vinyl twisting up on itself when the nut is tightened...
Hope some of the above helps, but please don't run your car looking like an unfinished GTI
Thom
