[destroyer125]

Etch process is with sodium hydroxide. A white crystaline dry substance you mix with water. Possibly your problem is coming from Not etching? Degrease the parts lightly with a toothbrush and some dishsoap. Mix some sodium hydroxide up (just alittle added to about 2 gallons of water) at between 70-120 degree's and let them etch for about 2 minutes or so, less if the parts are highly tolerance sensitive. Then wash followed by the desmut step, hand dry then blast with glass beads, then degrease again. Amazingly enough if your Deburring your parts with a vibratory tumbler, those things are as good for degreasing parts. Mix some corncob up with soapy water and run them for about half hour or so and it will actually wash and lightly scrub them.