I have a batch (80-100) of M2 x 8 and M3 x 10 screws to "blue". What is the procedure to use , (I know how to blacken parts), to get a nice blue, especially for those small parts ? PIerre pierre.courbouleix@xxxxxxxxxx This e-mail is intended for the adressee(s)only and may contain info that is the property of, and/or subject to a confidentiality agreement between the intended recipients.If you have received this e-mail in error, please contact the originator of this e-mail via e-mail and delete copies from your computer or network. Misuse of the content of this e-mail message may violate the Laws of your Country MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.