New experiment and page update.
I'll quote the relevent bit here:

'I recently synthesised some Copper Salicylate (precipitation from mixing
solutions of Sodium Salicylate and Copper Sulphate then washing it in cold water
– it is possible to buy these but I made my own, and purified them, from 'common
household chemicals' for this small scale test). Made up a 1%-2% solution in 80%
DMSO with water, 1% Thymol and some Methyl Salicylate at around the 1% mark. The
effect was almost immediately noticeable, with an estimated 50% of the remaining
redness being cleared within three days of first application. Naturally I am
going to have to start experimenting with ratios again, but this is a major step
forward in my estimation. As an added bonus the solution is a beautiful emerald
green!

It seems that Copper Salicylate is an anti-inflammatory that is an order of
magnitude more powerful than aspirin/salicylic acid, and comparable to
Cortisone. Additionally Copper is an anti-fungal agent in its own right, so I
will have to see whether any long term benefit accrues from that aspect. At
around the level of application I am using it (moistening the affected facial
areas three times a day) the amount of Copper I will be absorbing I calculate
not to exceed the recommended daily intake for this element. It is worth bearing
in mind that Copper competes with Zinc for uptake in the body and supplemental
Zinc may be required to maintain the correct balance. Time will tell.'

http://www.kbnet.co.uk/artemis/rosacea/