I have multiple cracks all over the dashboard (2010). Always use a sun shield and was garaged most of its life. I’m using flexible speckling (see next post picture) that seems to work pretty well and inexpensive too. I’m going to use two products once all the cracks are filled. They are Dupli-Color Plastic Adhesion Promoter (first coat) followed by their Vinyl & Fabric Specialty Coating. It’s nighttime now so I’m waiting until daylight to get some pictures for everyone of the partial spackling step.