Painting window glass

I understand that its difficult to keep a good finish on painted glass when it gets allot of sun - especially when the glass is patterned.

I've come accross a few primer / protector products that may or may not work.Has anybody used any of these on glass?
1.
https://www.swiftsupplies.com.au/weicon ... -250ml-can
2.
https://www.cmcpaints.com.au/shop/1k-glass-primer/gp.
3.
https://www.nanovations.com.au/product- ... ample.html.
4.
https://www.automegastore.com.au/303-ae ... VhEALw_wcB.
5.
https://www.fixtech.com.au/primers---ac ... eaner.html

I used ESP many years ago, I can't remember the purpose but I remember being pleased with it.

Thanks for that. Hopefully one of the UV sealants will help protect the paint from the sun.

Hmmm, the ESP was a primer I used on glass to make the paint better adhere to the glass. I think I have mixed up what you actually need. Sorry.

No, I just need ways to make the job last.nI will definately be using your seggestion as a primer.