Nickle/Chrome Stripping Question

[browningautorifle]

It would have been better to just do that right from the start

I've tried to explain that a few times here without success...

There is some slight copper wash that has remained

Shouldn't be, just a longer blast will take all of it off. Remember to use the lights to show the color at an angle, you may need brighter bulbs. You'll see it being removed.