Do you just buy a standard nail glue & use as needed or do you apply them with the glue initially? (mackmarie.com)
The purpose of the wax paper is to keep the «shelf top» from getting glued to the extra wood pieces, while the liquid nails glue is drying. (stowandtellu.com)
You can stick them using good clear nail paint or using nail glue. (stylecraze.com)