Image credit: RPS Sundays are for watching Youtube videos about different types of laminate primer and working out if you've taken on too much by redecorating the kitchen. One video will recommend one brand and 120 grain sandpaper, another will talk about MDF undercoats and sugar soap, a third will say to ignore the haters and just use a vinyl wrap. You're going to need a big mug of tea to get to the bottom of this. Or, you could put off the research and the inevitable trip to B&Q and just read some articles about games (and everything but games. Over at Aftermath our old friend Nathan Grayson has taken a closer look at the graffiti in Left 4 Dead , speaking to writer Jay Pinkerton about how they hit an authentic tone. "My memory of the Left 4 Dead graffiti is that it was an early attempt at crowdsourcing," Pinkerton told Aftermath.…