Western Washington bee keeper, directly answering your question, you’ll want oxalic acid (wood bleach) and a vaporizer, the OA is readily available at hardware stores and I bought mine through Amazon, the vaporizers you can get at Dadant or Mann Lake. My Bee Association President makes and sells them, which is my suggestion, get into a bee club. This sub is outstanding but having locals who can tell you when and how is invaluable, so much depends on what is going on in your area things like weather and bloom/nectar flows are good to hear from experienced locals. Congratulations and good luck.

OXALIC Acid 99.6% 10 Lb. Deck, Crystals, Metal Cleaning- Rust Removal, Wood Stain Remover and More! https://www.amazon.com/dp/B0147IFKBY/ref=cm_sw_r_cp_api_glt_i_S2RSCVFYABKRW1BFSTHP?_encoding=UTF8&psc=1

https://www.mannlakeltd.com/beekeeping/feeds-medication/oxalic-acid-vaporizer/