Fiberglass is non-porous and won't absorb the stain the way a wood surface does. So, it's best to apply Gel Stain with a bristle brush. Excess stain should be evened out with the brush - not wiped away with a rag. See application instructions above.
There are many types of foundation that you can use but the two main differences have to do with using plastic or sticking to straight wax. Beeswax foundation uses only wax. One benefit is that the bees like this foundation and draw it out quickly.
As soon as this occurred, the bees ceased to excavate, and began to build up flat walls of wax on the lines of intersection between the basins, so that each hexagonal prism was built upon the festooned edge of a smooth basin, instead of on the straight edges of a three-sided pyramid as in the case of ordinary cells.