From what I gather, Jon, Intercept Shield was a company that produced Albums and storage for coins that would protect them from the elements of toning and what not. I've a set of Eisenhower Dollars album (Intercept) of their's and I see nary a suspect of toning in all these years. I also hear they are no longer in the here and now.......
Jim's alternative to Intercept is still the best I've seen... Use a zincoln (post-1982 penny) and sand the surface so you have fresh copper. Once the coin turns brown, sand again. Light surface sand only... as you only need to remove the oxidation. It's the cheap (one-cent) alternative.
Why would you assume that? Just because there are far cheaper alternatives doesn't mean the product doesn't work.
Im just trying to get down to whats behind the smoke and mirrors. Wouldn't it be cheaper to wait for a shooting star and make a wish that none of your collection corrodes?
I suppose... but that wouldn't be considered a cheaper alternative, since it's highly unlikely to work. The zincoln solution works.