Anyone used birchwood casey perma blue? Thoughts?

show much. De-grease it good and use a Q-tip and put it on. let it dry and wipe it down with a dry rag. If it didn't take, do it again. When it is somewhat the same color as the rest of the gun wipe it down with an oily rag. Don't expect it to match the rest of the gun as it very seldom does.

I use Oxpho-blue for big jobs and little jobs.