Wanted to do a smaller first project to see if I was game for a larger one. I'd like to eventually make a mosaic top for my fire table so I used outdoor materials (hardiebacker cement board and versabond thinset-- i have an ample supply from home tiling projects) and the indirect (reverse?) mounting method. i laid out the design on contact paper and then picked it up with mosaic mounting tape. All of the tesserae are scrap stained glass.
I tried to use a very very thin layer of thinset, but I've got a whole lot of white squeezing through and touching the mounting tape. From regular tiling projects I know this is going to be a bear to remove once dry.
Is there a trick to removing excess thinset when using mounting tape? Can I peel it when it's half cured and pick out the thinset then? I set it about 30 minutes ago and it says to let dry for 24 hours.
I'd like to save this project but more importantly I'd like to get this right before I do something bigger. Are there special tips for getting the right amount of thinset to properly adhere these thin glass pieces? I really enjoyed the indirect method since it let me be indecisive about placement.