Search via google is your friend.
Two good answers I have seen others post:
From Jack L: "Zep makes a liquid wax stripper that will take the old wax off. Use a spray bottle and spray it on a wet trailer full strength to let it soak and cut thru the old wax. Do this on a cloudy day, or in a light
rain. On a sunny day things dry too fast. A good scrub pad and warm water help too."
From Borrego Dave: "use the Zep stripper full strength, cutting it to what Zep calls for will take 3 or 4 go arounds at least. I used a spray bottle and one of those green/blue rough/soft sided kitchen sponges, I used the rough side. Worked areas about 3x3'. Sprayed it on, waited about ten seconds and hit it with the sponge and rinsed. Took about an hour to strip my SD17. Only had a couple spots I had to go over again. BTW, my egg sits outside in the SoCal desert and the Zep shine lasted two years very well before I decided to strip and rewax to stay a head of it. It's 107* today, big cool down going, it has been running 115-117 a few days ago . I understand your concern from all the threads, I read them also. So from my experience, if it can hold up to the extremes I have here, I'm staying with Zep. YMMV"
Bar Keepers Friend is not designed to remove wax. It is a surface cleaner. Once the wax is off, sure, its a very good product.