How can I use this extra wax as a sealant for a planter?

Making a large planter out of an old entertainment center I have. I’m going to sand off the existing sealant on it, and I want to reseal it with something. But we’ll be growing plants in them, obviously, including edible plants… so when I reseal it I want to use something non-toxic.

I was doing some reading and a popular choice for the inside is bees-wax (while on the outside I will likely just use polyurethane paint). I started looking around for bees-wax, but unfortunately aside from online ordering it is difficult to locate (apparently a lot of do-it-yourselfers like the stuff). Then it dawned on me that I have probably a gallon worth of regular candle wax saved up in a bucket. I used to put candles in it to burn them (to catch the wax) and then just put more on top as I went. It would be some work to get it out of the bucket, but it’s probably more than enough wax.

So my questions are this….
1)This is regular store bought candle wax. Basic tea lights, scented candles, various colored candles, and fancy candles from Pier 1 or what have you. Is that going to be safe? (I figure yes, I mean I was breathing it after all)

2) The Beeswax suggestion said to boil the beeswax in a pot and then apply with a brush. Will this same method work with the regular wax, or will I have to mix in some kind of oil or something?

3) Any further suggestions?