For almost all of history, it’s been very difficult to grind rails and to proclaim your love of Scottish post-rock at the same time, as anyone who’s ever attempted to yell Arab Strap album recommendations mid-kickflip can tell you. But it just got a whole lot easier. The skateboard retailer Focus Scotland has collaborated with Glasgow institution Mogwai on a new line of T-shirts and skateboard decks, and those boards feature images of the band’s album covers. These limited-edition boards are intended to celebrate the band’s 20th anniversary, and they’ll be for sale on Saturday at Mogwai’s website and Focus’ online shop. Some of the proceeds will benefit the Glasgow GUSM74 skate park.