Our Trunki office is Pretty darn cool inside, we have an escape chute slide, ping-pong tables and full on intergalactic decor, but lately we've been thinking that the outside could do with a bit of sprucing up too. So we got some local graffiti artists on board to help us give Trunki HQ a little a makeover. None of us had ever picked up a spray can before, so we asked them to teach us a few tricks of the trade to help get going, (and stop us turning the building into a scene from a toddler's colouring book). We started off...