Dave,
I used similar flame gun 40 years ago. VERY satisfying to use but lots of weeds just come back from the roots.
It seems a poor method now, with the availability of modern weed killers, in particular, Roundup - glyphosphate
that one of them little things for little weeds?
i need big thing like a sheen or i be there for ever, it a large area about 3 times size of your back garden.
this is a sheen
You can get the one's which take the gas bottle you normally use with blow tourches. That what we use, but remove the gas after use as it seems to over time slow seep out if left attached, and then when we go to re-using it theres no gas.