I thought it wasn't working, then i shined a black light on it for a few seconds... and boom!
We use this to paint the skulls on our concrete tombstones.
It lights up the glow in the dark paint fairly well.
I bought 2 cans to do the trim in my son's room.
Had to give a few coats but works greats lights up nicely.
After several coats, i still had no success in getting product to glow.
Does not work even on a white surface.
I used a knife to mix it- but it did not regain a paint-like consistency.
This doesn't seem to glow unless you use alot of it like thick globs if you spread it out nicely with a paint brush it doesn't glow at all.
I have this on my daughter solid white bunk bed and set up a black light to make the bed glow and it didn't glow at all unfortunately I'll need like 3 to 5 cans to get it coated thick enough to show up with this tiny can.