

I posted this a while back, came across a post on hackaday on doing clear lens on a resin printer with lower effort, the article links an older one about doing clear resin prints that might be helpful. To me they look pretty decent, certainly a heck of a lot better than any transparent prints I’ve done with a filament printer.
As others said though, easiest would probably be doing something like laser cut acrylic and sandwiching the picture between them.
Are you able to mess with the first layer offset on the bambu printers? May need to bring your nozzle a bit closer, especially with a textured surface. Temps seem comparable to the stuff I have on hand.
For cleaning, is soap and water compatible with your surface? Personally found that while IPA is fine for maintenance, a few drops of unscented dish soap in water works extremely well as a degreaser, I’ve literally washed stubborn surfaces in the sink. Petg is super picky with any residual oils and the small nozzle could totally make that worse.
Maybe try running slower? Just to eliminate variables, may be worth running a quick extrusion calibration? Petg can be an absolute pain for bed adhesion in my experience.