Depends on how you apply the blue. If you apply to the part and rub on the plate you file the shiney parts. If you apply to the plate you will file the blue parts. Remember use the blue sparingly. Best way I have seen it done is using a balled up shop rag with a tear sized daub of blue imbeaded in its surface. Apply the blue to rag and pat it into the fibers so that it puts only the slightest amount onto the surface. Too much will make everything blue. Think about what you are trying to achieve and reason through the process. Also remember school should teach you the basic skills, but most importantly it should teach you to think. If you hand a job to 100 toolmakers you will get 100 different ways to complete it. |