Retro kitchen designs are rocketing in popularity as homeowners look to revive the nostalgic fashions of the past. Old-fashioned telephones, retro kitchen appliances, classic memorabilia, and even old-school “futuristic” designs can be used to complete the picture of today’s creative retro kitchens. The best part is, unlike with most vintage kitchens, you don’t have to be a purist; you can pick and choose retro elements to bring into an otherwise modern kitchen. Hot Rod: Here’s a…