You are all working Way Too Hard.
Typical installations insure that any battery will be covered in a coating of sulfuric acid. The only real cure is to hide it inside something impermeable and marginally acid proof - Like a trash bag.
A lot depends on how much you will have to do with the battery after it is removed. Basically, it all works like this:
Get gloves and a trash bag per battery. (For 4 & 8D, make sure the bag is large enough.) You may also want packing tape.
Prepare an landing area (LZ) that will safely support the battery and cover it with the open bag. The LZ should be close enough that you can get the battery there while holding it clear of your clothing.
Lift the battery and set it on the plastic.
Deglove (Remember the outside of the gloves are "hot").
Wrap the battery and if you have to go far, secure the plastic with the packing tape.
Now you can carry the plastic wrapped battery without fear.
Toss the gloves.
I did a lot of boat work before the depression, and most for performance cruisers (retired racing sloops) that always had batteries (bad batteries) in impossible locations with all kinds of finished interior in the way. I fortunately learned how to do this early. We almost always had to rig to get the 4 and 8Ds off and the new back aboard.
Matt