I get where you’re coming from, but I’ve actually had a bit better luck with those kits—at least on smaller chips and scratches. The trick seems to be following the instructions to the letter, especially with curing time and temperature. I used one on a bathroom window, and while it’s not invisible, it’s held up for a couple years now without yellowing. That said, anything in direct sunlight or at eye level is probably going to show flaws eventually. Full glass replacement is definitely cleaner, just not always in the budget for everyone.
I’ve had a bit of a love-hate thing with those kits. Like, step one: optimism. Step two: realize I’m not as steady-handed as I thought. But you’re spot on—if you take your time and don’t rush the curing, it’s not half bad for little nicks. Did a repair on my sunroom door last spring, and if you don’t squint too hard, it’s basically invisible... unless the morning sun hits it just right, then it’s like a tiny disco ball.
One thing I always wonder—does anyone actually sand or polish after applying the resin? The kit instructions mention it, but I’ve never been brave enough to go at my glass with sandpaper. Feels like a recipe for disaster. Has anyone here tried that step and lived to tell the tale?
I actually tried the sanding thing once on a little chip in my patio slider. Used the finest grit I had, went super slow, and honestly... it didn’t make it worse, but I can’t say it made it invisible either. The glass didn’t scratch up, but the spot’s still kinda obvious if you know where to look. I think the polishing pad they include is more for peace of mind than real results.