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Covered with a skim of filler the panel looked better and at least should hold the windscreen in place.Repairs should be primed,then covered with a gloss paint for complete protection as quickly as possible and this should be done on a dry day.Primer or filler are both porous.Damp steel corrodes very quickly and metal that has been welded corrodes at an alarming rate if it is not covered and protected.. |
Simply plating over a hole with the new metal overlapping the edges leaves an area of unprotected metal which will carry on rusting behind the new patch.It will soon spread to the back of the patch and lead to an even bigger hole.Cutting out the rusted metal completely and then butt welding in a new section with the welds ground down and both sides painted and protected gives a longer lasting and neater repair.Don't forget to disconnect the battery,alternator and any sensitive electronic componenets (alarms etc) when using an arc or mig welder on any vehicle.Welded repairs will rust quickly if not painted,the heat from the welding torch burns off any residual protection from oil,grease or paint and corrosion sets in fast.Likewise steam cleaning a chassis or engine leaves bare metal unprotected and damp,ideal conditions for corrosion.
Many rust removers or convertors contain phosphoric acid to neutralise existing rust and some primers contain zinc to discourage further rusting.There are many oils and liquids which it's claimed slow or stop rust from spreading.Some of the common treatments include Waxoyl.Dinitrol,Kurust,3in1 and Eureka Fluid Film.Rust bubbles on paintwork usually indicate rusting under the paint coming through from the back of the panel,and usually the rot is much worse on the back of the panel.
Before welding,check for carpets,wires etc on the reverse side of the area to be welded,disconnect the battery and alternator and have at least a full bucket of water on stanby in case of fire.
Welding Forum
A forum full of welding information.Lots of info on mig welders and welding techniques.
Motor City Welding Tips
More welding tips,welder tests and other info.Well worth a look.
Mig and arc welding videos.
Videos covering various aspects of mig or stick welding.Faults,buying equipment and techniques.
Restoring a Rover P5B.
Some people say these are the best cars Rover ever made.
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