Several years ago I found a homemade method for a substitute for store bought tack cloths, but have lost the recipe.  Anyone out there care to comment on the subject. 

Patrick

The store-bought ones are made from rosin and cheesecloth.  You can get rosin from specialty suppliers like WoodworkersSupply and dissolve the stuff in alcohol, then work some of it into cheesecloth. 

An alternative is to just pour a bit of varnish into cheesecloth and work it in.  The varnish will eventually harden so it won't last very long.  The rosin ones will last a long time if stored in a tightly capped container