There are commercial products designed for storage, check Brownells.
Regardless of what they may be, I will not store any gun enclosed in anything.

All of mine that are stored are "open" to air circulation.
NEVER store a gun in a closed foam case, or in or touching leather.

As far as restoration goes, I'm seeing bad results from Ford's mentioned on a Colt forum.
They seem to have gone downhill from those reports. If true, I would not send a classic to them today.
I've seen a couple photos that looked atrocious.
Denis