For years I operated an amphibious Beaver in Kodiak, and between height and wind, wing covers weren't an option.
I kept a 3 gallon weed sprayer in the furnace room, with about a half gallon of RV anti freeze (not ethyline glycol, ie: auto antifreeze). Getting ready to go fly, I'd simply run some hot tap water into the sprayer to make a full three gallons of anti-freeze/water mix, and de-ice.
I wouldn't use straight water, unless the temps are really warm, in which case, it'll all melt anyway. I also would'nt use straight anti-freeze, since it isn't necessary, and costs more than the mix of anti freeze/water.
Also, diluting the anti freeze helps to negate any possible effect the anti freeze could have on the plane, which I don't think is an issue in any case.
A three gallon sprayer would de-ice a nasty iced up Beaver, and the stuff won't re-freeze, or freeze up your pulleys, etc.
Not only that, but it'll serve for at least a while as anti-ice, since a thin film stays with the plane for a while.
Mike V