I work with a hot dip galv company in Ellesmere Port and have casually discussed projects like this with them before. Now apart from the cost of getting the car back and forth to one of these places, as Mr Henderson rightly pointed out, the chassis needs a lot of prep.
Its not so the zinc can get inside the chassis, its because if you submerge an enclosed object in liquid metal, any water instantly boils and expands like mental. If your lucky it just deforms the tubes. If your unlucky the super steam explodes, empting the bath of liquid metal all over everyone in the factory.
So you have to drill at least 2 decent sized holes in the tube to allow moisture to vent and then once full of zinc, to allow the zinc to drain...... hoping it doesn't collect and weigh your chassis down.
Or you could paint it for £20.......
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