I recently picked up a portable welder for trail repairs and wanted to use goggles instead of a helmet because a helmet would take up a bunch of room and roll around. Is there any reason not to use goggles for mig welding besides getting your face sun burned if you weld too long? The reason I ask is the 10 shade goggles I picked up say do not use for mig, tig or arc so I thought maybe it was a different scale for gas welding so I looked through a lens for a arc helmet and they look identical. So I guess the question is would they be alright for trail repairs and not full on welding? Thanks