I've sprayed nitro lacquer a lot. But, today I noticed something weird, something I've not seen before. After spraying, there were a few small, hard white specks in the finish. They are super hard, like cured lacquer but I don't know where they came from. You can almost not even scratch them off with your nail. They weren't there prior to spraying. They can be sanded out but I'm wondering if anyone else has had this issue and what the cause of it was? I pour my lacquer into the spray cup through a paint strainer so I'm really confused as to what this is. Was it a contaminate in the cup and got sprayed out? Is it some weird reaction once sprayed?
This is Nitro lacquer which is thinned and sprayed through an HVLP sprayer.
Any thoughts?