So I have a bunch of flower pots, some for indoor and some for outdoor use, some in terracotta, some in light weight concrete and some in the regular ceramic/stoneware flower pots usually are made of. Glazed and unglaced. And I wanted to cover them with mosaic, I mostly have those regular square glass mosaics. I have glue/mounting paste (or whatever is the right translation) and grout for bathroom tile and two-component epoxy for boat hulls. I also have water based pva wood glue for outdoor use and winter use. Would the mounting paste, grout and epoxy work properly with the materials and conditions listed? What I've read pretty much all pva glues are more or less the same thing even if the label lists different usages, but I don't know if that is true? I'm thinking the terracotta pots will absorbs water and make the mounting paste and mosaic come loose so I will need some sort of finish or primer or something on the pots first. I don't know if concrete and stoneware absorbs water, I'm assuming they don't? What would be suitable as primer/sealer? Or is it even needed? I was thinking the epoxy would do but will toxins from it leech out in the indoor air or be absorbed into the edible plants I will plant in the pots? Or is that of no real constern? Of course I could just put plastic bags in the pots but I rather not if it can be avoided. I'm assuming I would need to sand down the glazed/painted pots but the unpainted/unglazed terracotta/concrete/stoneware pots is fine as they are? Or would the mounting paste/grout stick to the glazed pots too? I also have a couple of small wooden tables I want to cover with mosaic too.They are mostly going to be used as flower pot stands or side tables and won't need to stand very heavy use. I've read since wood is so movable it nessesary to add a plasterboard on top of the wood and then put the mosaic on the plasterboard. But would that really be necessary or worth the cost if the tables are only going to stand around and look pretty? I know it's a lot of questions but I really don't know anything about those kind of stuff and when I tried to research it's either mommy bloggers, building sites that's way to technical or they use things that's not sold in my contry.