I'm thinking it would.

I bought "Glitter paint" to try and make some van Gogh glass . It worked great ! Now I have sparkle glass ! It IS really goopy though ... I'll give it a test for you and see what happens.

TEST COMPLETED . Glitter paint works great ! It sticks to the grout and wipes clean off the glass.

The 2 grout lines to the right are sparkly now , the left one was left plain. Now we know !!!!!!!!!

{{!gwi}}

The glitter paint should work fine, the glitter fabric glue,
would be a a rubbery silicone like texture to the grout. It
would work though, if it was just painted on the grout.

So it (fabric glue) would stick fine, but would not be 'flat' on the grout?