Soldering is done with a zinc based alloy in either stick or powder form.
How to solder zinc sheet metal.
Here is a helpful video giving you a quick rough how to on solder grinding fluxing zinc.
What flux should be used.
Any advise of soldering copper sheets to stainless steel sheets.
Our plan is to clean the copper roof panels and the solder the stainless steel sheets to the copper then build the hip vent off of that.
Learn the basics of soldering two pieces of metal together.
Feel free to ask me any questions you have in the comments.
Looking to use a stainless steel perforated sheet metal for a hip vent on a copper standing seam roof.