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Originally Posted by Graham
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POR-15 does bond to rust. That is what is intended for...
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I respectfully disagree Graham.
I haven't been using the POR-15 for long - only about four years. BUT buyer beware - don't believe what's written in big letters on the tin - following the instructions (also on the tin in small letters) and you'll get to see a different story. POR-15 can not cope with anything more than very very light surface rust. You can indeed paint it straight onto rust and it will look like it is doing a good job for a while. But as it cures POR-15 goes hard. Knock it with a hammer and if there is rust underneath it will come off in great big chunks.
So to those people who don't want to use an angle grinder and a wire brush attachment your repair won't be that good. You really do need to clean and clean the surfaces as much as possible to end up with a good result.
Quote:
Originally Posted by Graham
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I think POR is an ideal solution for the bottom of the hinge pockets which I doubt are structural.
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Sorry Graham I disagree again - that part of the body looks to me like it is designed to be super stiff and light. It looks to me like it is additional stiffening to the bulkhead and therefore plays an important role in the protection of occupants in a head on crash.
Quote:
Originally Posted by Graham
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One problem with weld repairs, is that it is not always possible to get at both sides of the weld. The hidden side gets oxidized and then rusts. Don't know how many times over the years, I had rust repairs done on my old cars and then saw rust appear in a year or so adjacent to the repair. There are weld through primers these days, but not always possible to apply them (such as inside rockers.
Nothing is easy!
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I too have seen many a repair go sour like that. I'll be spraying the internal parts of the cavities I weld with Dinitrol. I hope it does what it says on the tin!