Well after reading this months Jewelry Artist and the Chris Darway article (page 20) - I just had to try applying PnP sheet to Copper Pipe.
I took two sizes of copper pipe and cut them down (picked up at Home Depot)
I really like this cutter - leaves and nice end - no puckering like the other pipe cutters
Nice and clean
I use 000-0000 steel wool to clean the surface
and I cut the PnP to fit
Now at this point as much as I am going to wrap in silicone tape I need something to hold it while I do
so I taped the sides
Just put small pieces at either end and in the middle
I wrapped the silicone tape (plumbers white tape - you can get at home depot)around the pipe - tightly
I have a Hot plate that I use for the my application of painted glass to beads so I plugged it in and set it to low as I was not sure how hot I needed to get this to work -
I also put a probe on the hot plate just to see what the temp was
so I stood them up on the heated surface hoping that the heat would flow up the tubes
I reversed them but could not get them to stand so put one inside the other and let stand for another 20 minutes to 1/2 hour - they didnt seem really that warm (even though it said 345 degrees F) so I eventually laid them flat (one inside the other) on the plate and hoped for the best
Totally forgot for about an hour (I am getting really bad at this )
I unwrapped the silicone tape - the PnP looked dark like it does when I use the press
OMG it worked
Its about 90% perfect - some small areas that need touch up but nothing major
What the PnP looked like after I took it off
I applied the Stop Out (another liquid resist) to the tiny areas needed and letting it dry
will etch hopefully today just have to get a container tall enough (bought a bunch of drink containers from dollar store - I have one rubber plug for the larger pipe but I have to come up with something for the other
going to fill with sand to make it heavy and the plug will not allow any ferric into the inside where I dont want to etch