I am thinking of experimenting with fumed silica to see if there is a benefit to Damx on salt prints. As I understand I should get the hydrophlic kind. But most what is available on the net is labeled or described as hydorphobic or not labeled at all. Aerosil lists a series of hydrophilic part numbers, like Aerosil 90, 200 and so on. However those numbers do not show up on any of the re-sellers' labels. What gives? Even B&S seems not to be selling any more. Any help in clearing up this for me will be appreciated. Thanks.