I didn't offer to skin it mainly because the feathers needed for a snipe and purple come from the wings,it is much easier for me to cut the wings off and dry them than going to the bother of skinning the birds.
Put them in the freezer in a plastic bag for a couple of weeks: that eliminates any pests. Then leave them in a paper bag with alum and/or borax: that preserves wings perfectly.
I did a bunch of Golden Plover wings a few years back and it all worked.
Honestly I do it very simply,my parents have an Aga in the kitchen.I cut the wings off ,into a ziplock bag in the freezer for a few days( to kill any insects) and put them on top of the kitchen cupboards for a few weeks (on top of newspaper).They dry out nice and quickly and stay preserved for years.My mother is very understanding!!I Have about 15 squirrels tails there at present which I have dyed plus some partridge wings for dog training. There are probably other ways to dry out wings but this has worked for me for nearly 30 years.
We are fortunate to have an Aga as well. I hasten to add that it was already installed when we moved in. I simply dry wings and skins by leaving them in the lower (cooler) oven overnight. That seems sufficient to dry them completely and kill any bugs. I have never had any problems.
As said table salt is fine, butchers salt is better, my butcher gives me a scoopful from his 28kg sack ever now and again, butchers salt contains nitrates, better for curing but not good when eaten, bacon, gammon etc has been linked to cancer.
I think its ok when accompanied with eggs black pudding and mushrooms :thumbs:
I've said this before, many times "Freezing natural materials DOES NOT KILL all infestations", it often just puts them into hibernation. Veniards, & most other suppliers now use microwaves (industrial sized versions) as it is the best option & by a long way. Being fast, has no noxious chemicals - extremely important - can be packed straight away, etc etc.