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Best is the CRC oxidising rust converter, then the primer, then top coat. Rustoleum is good at priming and top coating itself. Whether you can be bothered with the extra steps for a grate though...?
FWIW, I've had the CRC spray and the paint on stuff. Paint on stuff works way better IME, though obviously is more hassle to apply.
mdf:
Best is the CRC oxidising rust converter, then the primer, then top coat. Rustoleum is good at priming and top coating itself. Whether you can be bothered with the extra steps for a grate though...?
FWIW, I've had the CRC spray and the paint on stuff. Paint on stuff works way better IME, though obviously is more hassle to apply.
The spray stuff is so convenient, and saved me a ton of time when fixing the roof, but it clogged the nozzle within a couple of minutes of use unless you do the "hold upside down and clear" regularly. I now have a couple of half-empty cans that I can't use, and I'm wondering how to get the contents out so I can use them without an explosion happening...
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