Always made my own. Usually a mix of spar varnish and linseed with driers added. Lately Min Wax Wipe on poly, turpentine, Tung,and Linseed with Japan drier. Might add Carnuba Wax to the last coats.

Both Pro-Custom and Permalyn are similar. Permalyn is closest to the Poly/Oil mix I like. It is an up dated version of Flecto-Varathane a long oil poly varnish.

Each person will find what suits them eventually. The search for an improvement over plain linseed oil has been going on over 200 years and hasn't ended yet.

"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli