Can you restore a car battery part 3

This is part three of my three part series on the quest to determine if it is possible to restore a used car battery. In part 1; I used high current to desulfate and restore the 11 year old battery in my 2010 Camaro SS (the factory AC Delco battery) to amazing results. Sweet Project cars recommended this technique however did not load test the battery. I duplicated his work and used a load tester to verify they battery was restored.

In part 2; I used the spare Crown Vic Battery and filtered the original acid/water mix, cleaned the inside of the battery cells, then put the original acid/water mix back inside. The battery showed some improvement (approximately a 50% increase in capacity compared to the current state of health). That number was still below 50% of the original capacity and thus, method 2 is a cheap and easy way to restore some battery health, but nowhere near as effective as the high current method.

In part 3; I will remove all the old acid/water mix, rinse the battery cells, and install fresh water/acid mix and see if we can obtain better results than method 1 or 2. After doing this, I have determined this method is not sufficient to restore a battery, and we actually see a 50% decrease in capacity down from where the battery was prior to performing method 2.

In my opinion, method 1 is the best (high current), it is expensive to purchase the high amp charger, but can be used over and over with multiple batteries and is relatively fast and easy.
Method 2 is the cheapest way but takes a little more time to perform and does not give results as good as method 1.
Method 3 takes the most time, is the 2nd most expensive, and yields negative results and actually decreases battery capacity.

I have done the science so you won't have to.