It sounds like your paste may have been exposed to air but that should not be a concern. Our paste is thixatropic, so you should be able to do some minor stirring to bring the product back to its original paste form. Keep in mind that our paste is a soft paste so it will appear more like a cream than a conventional, hard wax. Nu Finish Paste has an extremely long shelf life and be assured that it will not harm your paint before or after it returns to its original soft paste form.