I was looking at Silverprints web site and came across Tetenol Light Protecting Varnish. Has anyone used this product or know much about it?

It comes in a can and is sprayed on to your finished print. Here is the information given on the site:

"For use with traditional print materials, monochrome or colour, FB or RC.
Available in matt, semi-matt or glossy, this aerosol varnish has ultraviolet absorbing properties, useful when used with colour prints to prevent fading when displayed in strong light. The varnishes also physically protect the print, and an appropriate varnish can be used to change the nature of the print surface, converting a glossy print to matt & vice-versa."