It would seem that the questions you should be asking is "in what way is the
premium better then the normal"? The question should be presented to the
people making the claim.
Second question, once the first is asked and answered should be one you ask
yourself. is, is the difference adding any finishing benefit to the project
that is actually needed and worth the money.
I'm sure we'd all like to hear the response to the first question. The
answer to the second question would be one that would have to be made by the
person assessing the use of the piece.
Personal opinion, the difference would have to be pretty damn spectacular
and offer protection on the order of a coat of diamonds and the piece would
have to be destined to be some place where it needed that protection, say, a
kindergarten, to be worth twice as much as off the shelf urethane.
Note, even then it probably wouldn't be worth it since, in such an extreme
case, the finish is sure to be damaged and need refinishing after a
relatively short period of time and the labor of removing such a finish
would make the job prohibitive. Picture trying to strip one of those epoxy
finishes you sometimes find on restaurant tables.
I almost get tired of saying it. The purpose of a finish is to protect the
wood from X level of use. The first question to ask yourself when
considering a finish is, what finish provides the minimum amount of
protection commensurate with the projects expected use. Then go from there
with questions such as, desired appearance, actual appearance, ease of
application, drying time, cost, etc.....
If you decide that whatever extras this super duper finish gives you, and
the extra isn't just hype, is absolutely essential to the long term success
of the job then twice as much or not, you use it and you price the work
accordingly. If you decide it is needed and a price is already set and you
can't convince the customer it is worth revising the job cost you eat the
extra cost. Last option is that you just use the off the shelf stuff and
keep mum about the whole thing. That is the way it works.
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