I want to distress some vinyl to the point that it's all gnarly and cracked. Think '78 LeSabre top that's been sitting out in the weather for 30 years. I imagine it'll require some alternating moisture and heat, but I'm hoping somebody out there might have some tips. I've recently discovered "crackling medium" (have never actually used it though), but it seems to be too "low-profile". I want texture! Fissures and blades sticking up, pieces flaking off as it rolls down the highway. You know, that sort of thing.
The attached picture is exactly what I'm trying to replicate.