Hammerite used to be an excellent product but unfortunately due to continuous " Improvement " under COSHH regulations it's now a bit rubbish. Have a read of this link, if that's ok with the mods?
http://www.model-engineer.co.uk/forums/postings.asp?th=97920Have you looked at something like POR 15 ? Australian stuff and rather good apparently...
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interesting reading....i remember using Hammerite years ago, was great stuff, "improvements" H&S, pc briggade etc seem to have ruined what was an excellent product. iv actually already purchased 4 litres of the stuff, not sure weather to return it or just apply extra coats?
looked up Por15 bedliner...seems similar to Protectakote with a rubberized finish, am wondering if the same problems would occure due to dragging etc?
tony
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There are companies that do spray on bed liner for pick up trucks which I did think about for mine. Don't know much about them but they're supposed to be near indestructible and are being used on the underside of some classic cars - might be worth googling ?