I always 'powder' each side of a mold prior to formig it... Am
I missing something by not requireing the effort to 'cut the
molds'... is the mold better or give a better wax if this technique
Some folks powder each side as you do. This works for some
applications (heat vulcanized molds). If using RTV (Room
Temperature Vulcanizing) rubber, this powder method is not
available, although another method of making the mold would allow
almost the same final outcome but it takes twice as long to make the
mold. Other folks using heat vulcanizing rubbers, either do not
know how to powder separate a mold or just would rather cut them, as
that is the way they learned and choose not to change.
As I always say, there are many ways to skin the cat (in this case
seperate the molds), but one way is not necessarily better than
another way. If it working for you, more power to you and keep up
the great work.