since you have the tires clean, I would use Dyna beads, I have them in my 39 inch Michelin XZL's on my 1009. 12 OZ. of beads in each tire. They work well. I will be getting some new centramatic balancers to add.
Currently the tires run well but want to add some extra balance media for the extra stuff that may get stuck to the tire and rim when off road.
The nice things about balance media and centramatics is they adjust to the extra stuff that sticks to the tire and rim.
tire weights just get torn off and are static and cannot adapt.
I would stay away from liquid balancers. The liquid is more for added weight than balance. If you have ever driven a tractor with liquid in the tires, at times it will get out of balance and the entire tractor will hop of the ground. It makes you wish you had the death wobble. very scary. This hop will happen just before the tire reaches the speed where centrifical force starts the balance process. The entire volume of the liquid will go around the tire making it hop.
You are using one piece rims so you will need a tire machine to repair thus a tire shop. You do not need to be concerned with field repair since you will never fix a flat in the field with a one piece rim unless you carry some serious pry bars and other tools.
liquid is for weight not balance.
It is primarily used in tractors and construction equipment that does not reach speeds where tires need balance.
Small amounts may work as a balancer but have to many problems. Beads are easy, used widely by the off road community and will not void a tire manufacturers warranty if you have one. If you were to go to discount tire for a patch and antifreeze poured out of the tire, they will not warranty it nor will they put it back on the rim. (good friend discount tire store manager for many years) And from what it sounds like a regular tire shop will not take the time to do a patch right on an antifreeze soaked tire.
Rich