I've cerakoted around ten firearms with the h series without any issues other than applicator error. Today I sprayed some bases with c series OD green and it ran off like water. I mean I couldn't make it stay on long enough to cover the white of the metal. I had them prepped just like the barreled action and bottom metal. I didn't have a bit of trouble with those parts when I sprayed them with the h series black. I gave up on the c series and sprayed the bases with the black after cleaning them back off. The black went on like clock work.I did spray the stock with the c series green and it seemed to cover fine. I used this OD green on an AR and it sprayed on fine a while back. The paint is about three months old and I've kept it in the Fridge. Any ideas about what happened. Thanks.