Mark @ Everlast
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Pam Cooking Spray - the stuff to make a frying pan non-stick - can be used for nozzle gel. Someone here suggested this to make the gas shroud easier to clean, and to put on areas where you will later scrape off the splatter made by flux core welding.
As a very occasional welder, just farm repairs that don't need to look pretty, I've remained with flux core. I bought HF's Flux Core Nozzle Set ($6) that replaces the gas shroud. This covers, protects, the gas outlets to keep them clean for future use and improves visibility of the puddle. There's nothing to clean, after wiping it down with a rag. This is what Mark recommended above.
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Personally I use the mig spay and gel. I like the spray for protecting the area around the weld so any "bb's" that are put out don't stick and the few that do release more easily. Of course, don't get it right on the weld or you can get a bit of porosity at times.