I need to strip the finish from some old furniture.
Someone suggested using Minwax Furniture Refinisher which supposedly
contains (among other things) alcohol, mineral spirits, and lacquer
thinner.

However, would I be better off just testing alcohol, mineral spirts, and
lacquer separately to see which ones best remove the old finish. The
theory being that it is better (and cheaper) to use the full-strength
version of the right solvent.

Or is there an advantage to using Minwax's magical formulation?