RE: "New" Krylon compatibility
This is a slightly edited answer, referring specifically to using #1131 Matte over #51602 Flat Black (new product), which I received from Krylon, --"these products are compatible, but the paint does need sufficient time to cure before the clear is applied over it. Ideally, it should be cured for 48 hours, and that assumes ideal drying conditions. Temperature, humidity and air circulation (or lack of it) will all factor into how quickly the product cures>"
I have been using Krylon spray paints for almost forty years with success, including on live steam engines. However, I have had occasional problems, such as wrinkling, when I have become impatient regarding conditions or laying on thin coats. From the reply above, it appears that the "new" products are more sensitive to this, and require more patience. Since I recently stocked up on primers and blacks for a newly rebuilt live steamer, I will be doing test spraying on samples to check things out, once the weather improves.