My boss has asked me to decorate his office as he knows I do a bit of diy. At the moment its magnolia matt but looks like it is washable. I( managed to rub off afew marks with a bit of spit on my thumb). Anyway grossness aside what paint would be recommended. I have read that Wickes trade emiulsion is good value. I quite like the look of Dulux Diamond matt , but is way expensive. Is there an industrial brand of matt emulsion that might be used in offices etc.