oilman said:Once the cuprinol has dried I've put tung oil on. You could probably mix it in and do it in one as well. Try phoning Liberon, their guy is very helpful. It probably does get affected by the sun, everything does, but another coat helps. It doesn't get bleached out as far as I know, but I might be wrong. It certainly improves things.
Oilman, you mention Liberon, but they are very expensive suppliers of tung oil. Can you suggest any other supplier in the UK ? (in the US, tung oil retails for about US$12/litre, Liberon is about £13.50/litre).