I ended up ordering the factory tint in the hope that the already more blackened appearance will help if I tint over it. Sounds exactly what you experienced. I am planning to do some of the back windows with a 5% tint.I have an 2018 with factory rear tint, with 5% (I think it was 5...it was the darkest they had) tint over it. You can't see the dot matrix that the film is adhered to well. Hard to see in. This is also over the defroster elements; can't see them at all. Well, maybe if you stare at it for 5 minutes in the right light. The same place I had this done at has tinted 3 vehicles for me. I still own a 2005 Honda Civic they did, tint looks brand new still. They use 3M.
If the tint company knows what they are doing, they can go over anything, including the defroster elements. I believe they sand them down (rough it up) somehow.
BUMP!I have a basic low roof cargo 150. No rear defrost. Can I just take a razor to the window and slice the dot matrix off before going to the tint shop? I'm planning on going almost blackout on the back windows.
It is called: Frit, It is baked on to the glass.BUMP!
That was my thought too, razor to scrape away. But I'm sure we're not the only ones. Anyone actually try, or heard of success?