I see where it says that Ultima Waterless Wash can also be used as a clay lubricant. Does it matter what brand of clay you use if using UWW as the lubricant? When reading elsewhere I see that it's recommended to use the lubricant for the brand of clay you buy but is that really necessary? As much as I love my Wolfgang products, I'd love to be able to multi-task UWW and save a few bucks.
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