Help, please: Finish on part of a shotgun

[Beathard]

I am engraving a Remington 870 for a local charity. I am attempting to French Gray the receiver but not the magazine tube. Im using PPG metal conditioner for the gray. Any ideas on how to protect the tube?

 

[Beathard]

No one have any ideas?

 

[rhenrichs]

Be sure all the grease/oil is off the tube....mask off the receiver....spray the tube with a couple of coats of Plastic HT clear engine paint....

Roger Henrichs

 

[SamW]

I have used Naval Jelly for this and fingernail polish has worked well as a stop off varnish.

 

[Ed Westerly]

I'm with Sam. A nice layer of nail polish keeps the blue there. (Also try to keep the exposure time low on the parts you don't want to change!)

 

[Tim Wells]

Black electrical tape should do fine to keep that stuff off the tube. I assume you have the receiver there without the stock and barrel and just that tube sticking out. I can't remember how that magazine tube comes out or I'd just describe how to do it and solve that problem altogether.

 

[Beathard]

The tube appears to be welded.

 

[BJREBUCK]

The tubes are brazed in place. Nail polish, stop out ground, paint or varnish will work. When I've tried tape it tends to leak under at the edges.

 

[Beathard]

Thank you everyone for the ideas.