the stuff i used had a clear peroxide like keytone or some thing to kick it off the vette guy like it was a bear to get out of the gun and clean up was tuff if you let it kick off you gun was junk but i was good for some thing that needed a lot of help .i stop useing it in the mild 80s i realy like the PPG dz primers and used that up till the K-200 came out but a lot of the shop i work at were still using the DZ pirmer for small fast jobs