Track your masks - ask your supplier if you can order a different color to help track new masks every time you order. When all your new masks are red and the old ones were blue, it is easy for you to spot which ones need to be removed from the process. This may mean your masking supplier has to set up two different part numbers, one for red and one for blue. That, however, should be an easy thing to do in order to help you control your masks and ultimately your process. These are just some of the things you can do to protect your investment in masking and to ensure that you are consistently producing quality finished parts for your customer. If you are interested in protecting your investment, a good masking supplier such as Caplugs or any of their distribution partners such as Greentree can provide help.