I have wax dipped about 4 pallets of various types of hive woodware and had no problems or issues and the wax thus far has held up in the sun although we have not gotten to mid Summer upper 90 degree temps, but I think it will do fine.
I like to dip the wood at the lower end of the temperature range at about 235 - 245 degrees for about 15 minutes. That way I can dip outer covers that I buy in bulk from Albert Zook with the sheet-metal on and not damage the paint. The wax tank is much less prone to foaming over in this temperature range although it does foam up a good bit.
I like to pull the wood out at 15 minutes and let it drip for a few seconds allowing the wood to absorb the hot wax and then give it a 2nd quick dip while the wood is still hot. This allows the wood to absorb even more wax. Be sure to buy a good quality set of insulated BBQ gloves that have gauntlets that reach to your elbows to protect your arms and hands as well as having an appropriate class fire extinguisher NEARBY in the event of a fire.
I have put out about 30 of the Canadian style 6 frame nucs like Ian Steppler uses. They have been rained on several times and the water just beads up and rolls off. The bees seen to be unaffected by the wax dipped wood.
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