Nice glassless Terarium there Paul.
Not sure if it will work, but I was taught 33 years ago by a syndicate car thief to change colours on a car, you lift the glass rubbers, tuck in some,twin core flex and mask, tucking the masking tape in under the rubber, and painting in under the rubber…….
It worked on a 63 Beetle I changed colour on.
https://forum.retro-rides.org/thread...esto-long-time
Good luck with that.