If you paint glass from the back, I definitely recommend these plexiglass sheets. The plates are well protected by two plastic foils. I don't know how these slides got so scratched, but the actual product doesn't have a single scratch, so I'm happy. They are not super flexible and are a bit stiffer.
24" X 48" Polycarbonate Plastic Sheet 1/8" Thick | Shatter Resistant, Easier To Cut & Bend Than Plexiglass | For Robotics Teams, Hobbyists, DIYers, Industrial Crafts
6 Review
Falken Acrylic Plexiglass Fluorescent Red Pink: Vibrant π¨ and Versatile Transparent Panel for Stunning DΓ©cor and Displays
4 Review
π Crystal Clear Acrylic Plexiglass Sheet: Excellent Transparency for your Projects
3 Review
2Mm Acrylic Hexagon Blanks For Light Base, Gartful 4PCS Clear Plexiglass Sheets, 0.08" Thick Cast Plastic Glass Panel With Protective Film For Table Signage DIY Display Projects
6 Review