FYi there are different "strengths" of alcohol readily available
in small quantities (Wal-mart) sort of like the "proof" of whiskey
so you want a bottle of 70 or 90, not the 50 usually found at the dollar store
very handy to put a spray nozzle on a bottle, and this is how pro-cleaning
people use it for, example, cleaning crystal chandeliers spray, drip, dry, no wipe)
or on touchscreens, spray, wipe..
high proof alcohol evaporates quickly and leaves no residue, but porous surfaces
maybe better to spritz a piece of cloth and wipe briskly with it
there are occasionally some surfaces which may react to alcohol (or water
graying a patch under porous varnish) so test an inconspicuous spot first
so whether cleaning spots or smells, alcohol can be very effective if used
judiciously (and outside if you need to spray a lot of it for a job.. it is flammable)
i use it a lot.. daily since Covid hell i carry around some small spray bottles
in my truck for hands, drive-up bank machines, etc.
next would be, many accordions have internal wood surfaces that are
unfinished, but better built accordions have internal surfaces painted
or sealed with aluminum paint or varnish (or urethane finish) so if you
clean the wood areas well and want to seal them to keep smells in
(and bugs out) go ahead and get a bottle of something like
Formby's wipe-on urethane furniture finish
just remember not to mess with anywhere things have to mate up when
re-assembled, or get them stuck together where they need to come apart
in the future
porous, soft materials hold smells more than others, so if it is easy to
remove some felt stuff and replace it, do so.
Mothballs can also be your friend.. setting a section of the accordion
in a big clean box lined with a big garbage bag then open a pack of
moth-balls or crystals in there and let it stew for a month or so..
you can use an old sock full of mothballs if you need to keep them from
touching any surfaces
as for the old accordion case, burning it is the easiest way to clean it,
then buy a nice new soft-case off Amazon or somewhere, but if it
is a really cool old case, like a Geib, tear out all the cloth, clean heck out of it
paint or varnish the inside and outside then glue a new cloth liner in it
good luck with your eventual restoration, as it is obviously a labor of love
and connection to your Family history.. don't forget to put a packet
together on your Gramps, the original owner, to keep with the instrument
for the Future owners