This may have sounded a bit strange, but I respect the beliefs and practises of individuals will perhaps differ to what is perceived as the 'norm'. I remember making up a witch's protection bottle many years ago. The contents did include menstrual blood, broken glass and urine. Sounds gross when typing it in the cold light of day but it was a ritual I took seriously.
Interestingly, a friend of mine when she had purchased a very old house (and we are talking around 300 years old) she renovated the kitchen which included sorting out the crumbling floor. She found an 8 spoke wheel and a bottle with liquid buried inside. I had no doubt she had found a witch's bottle, and admired her respect for replacing these items intact. (I didn't tell her what the liquid may have been).
As to wrapping the deck in such a cloth, I respect the reasoning behind why that person saw it as important, albeit I would not even think of going down that route. Personally I would not do that as we have to remember, at the end of the day we are talking about something that is cardboard, thus prone to being damaged. In addition if others are going to handle the deck I think I owe it to them to ensure they are not going to be asked to handle something that may not be as hygenic as it could be.
Davina