The shelf life of stop bath is indefinite. As long as it has not turned purple, it is still good.(posted 8291 days ago)As for the tutorials, go to http://www.ilford.com/html/us_english/bw.html and download the .pdf files for the RC and FB versions of Multigrade paper. There are pretty good instructions there.
Currently, there is not a fact sheet for the chemicals posted on the web. The version that was there was getting out of date, so we have removed it, and hope to have an updated version posted shortly.
David Carper ILFORD Technical Service