That's only really for oxygen but proper leak detection fluid is always a better option as it is more effective at detecting leaksI thought that soapy solution was a no, no as it has lanolin in it.....
With oxy and oil think diesel engineGenuine question [leaving veggies out of it ] - what are the potential consequences if it's an inert gas, or are you thinking/recommending in general terms e.g acetylene, propane etc?