I use waxed paper for various glues to prevent unwanted sticking. In my earlier days making musical instruments, I would make would clamping blocks and the like by heating small wooden bits in a low temp oven in a beeswax bath. Would take them out and continue the heat so excess wax would drain off. One needs to careful of fire of course. Nothing ever stuck to them.

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1986 300SDL, 362K
1984 300D, 138K