If you can find it, black aquarium silicone can look very good too depending on the setup. As long as the main panels aren't cracked I'd go for it.
And reusing, upcycling, and fixing broken stuff is the way to go for me as well! It really does save money. Sometimes it doesn't save sanity though so take that into consideration haha. I have projects I haven't started or finished yet. Or parts and tools are discombobulated since I'm a bit lazy... the bf sure gets annoyed lol.
Thankfully my main fish tank stuff stays in one area and my old stuff that is currently dormant for my next 5 gallon nano tank goes in its own box.