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.
Propolis or bee glue is created from resins, balsams, and tree saps. Those species of honey bees that nest in tree cavities use propolis to seal cracks in the hive. Dwarf honey bees use propolis to defend against ants by coating the branch from which their nest is suspended to create a sticky moat.