This guy demonstrates flux core welding pretty good, gas and gas-less. I prefer solid wire for filling gaps but I suppose out in the weather self shielding wire might be better...
3 REASONS YOU GET WORMHOLE POROSITY!! - YouTube
3 Flux Core Myths DEBUNKED - YouTube
3 REASONS YOU GET WORMHOLE POROSITY!! - YouTube
3 Flux Core Myths DEBUNKED - YouTube