so last June I had a @Tarmac@TarmacSportz rivet-less ducktail fitted by a body shop
they also smoothed and painted my front bumper.
finish and match of Bumper is perfect. Spoiler was also great until maybe September. Then small blister/bubbles started to appear.
photos below : please note this photo was September. There are many more now.
I though they could be air filled, from maybe pours in the fibreglass. They where inspected by painter today and when we pierced one it was full of water.
when we fitted Spoiler afaik It