I started a thread on braille scale rivets a while back in the braille scale forum:-
I thought I'd let you know how I have been getting on.
I loved Peter's idea of the 3d paint, unfortunately, couldn't find a supplier of 'Scribbles' in the UK.
I found this company which does a range including 'Scribbles':-
I managed to get hold of 'Tulip' but unfortunately, it doesn't work very well. It's okay when it first goes on, but it spreads a little and shrinks back.
I have tried letting it dry for 15 min before using it, tried letting the paint settle and using the thick stuff at the bottom, but it just isn't working for me.
I would love to get this technique, so if anybody knows of a uk distributor of scribbles that sells online, please share!
Instead, I have gone down the water filter route -- luckily I have time on my hands and I'm not in a hurry!
Rather than using a drill to mark positions, I use a Swann-Morton scaple with a 10A blade. I can place the point very accurately, I then give the plade a twist and it makes a guide hole. Having previously sorted and sized the ceramic beads, I then use a fine brush to apply either a solvent glue (Humbrol liquid Poly) or Future floor wax.
It takes a huge amount of effort, but the results are very good.
By the way, I used Tescos own brand water filters. They are cheaper, and seem to filter water okay, and have plenty of tiny beads. I got several large bowls and a siv, this took out the larger beads and all the charcoal - But I still managed to get hundreds of beads all over the carpet.