I'm thinking of using the Spectralock epoxy grout on my shower install. I have a accent section that is the 1" by 1" colored glass tiles with the 1/8 inch separation. Now I'm pretty sure this is a sanded grout. Does this matter? can you even get un-sanded epoxy grout? Since this section will be right at eye level for the end of time in my shower, will I scratch it with the epoxy grout? Would I be better off using an un-sanded grout and going with a fortifier, etc?