Aged aluminum with hefty oxidization or other surface particles could need sanding or grinding, or wiping with isopropyl Liquor and acetone. Metal Pipe Flux Cored Wire – This Specific wire enables mechanics to weld steels without having to use added materials like flux as it arrives pre-fluxed in its core; https://mobileautorepairnearme70639.blog2learn.com/75424606/a-review-of-types-of-solder-to-use-on-aluminum-radiator