Rich White wrote:
> I need some advice from this knowledgeable group... We have a set of metal
> steps that need work. These are heavy site build steps not the type you see
> on trailers. The tread surface is diamond plate and was replaced last year.
> Nothing was done to protect them after the repair. I was thinking of blasting
> them and then painting them with POR-15 this summer. Is this a good idea?
Things to consider:
a) POR-15 is tough stuff, but...
b) It sticks well to rough bare-metal surfaces, poorly to smooth bare
surfaces, not at all to other coatings.
c) The standard black POR-15 disintegrates within a few days if left
exposed to solar UV.
d) Topcoating POR-15 basically has to be done while it's still tacky; if
you wait until it's hard NOTHING will stick unless the base POR-15 is
abraded enough to provide 'tooth' (in your case that might require a
lightly-abrasive blasting of the cured surface.)
e) In your application I'd be concerned that the topcoated surface would
see enough wear that it'd leave the base POR-15 exposed, which would
then begin to peel.
John.
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