Searching for an alternative to powdercoating a metal bumper. Has anyone wetsanded and buffed out POR-15 to a decent finish???
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it maybe possible. i have polished the stuff that wurth sells (basically the same thing) it holds a shine well.........buy it doesn't stand up to rock chips very well as that was not its original purpose.
i also sprayed it on instead of brushing it, you just need to reduce it a little then spray it from a gun. it will lay pretty smooth, and the orange peel will flatten as it dries. the drying times are longer since you thinned it out though.seien Sie größer, als Sie erscheinen
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Well, lemme ask another question, then. Do i have to powdercoat euro bumpers, or should i just paint them.
I'd rather save money by doing it myself, as long as there is a painting method that will hold its own.Comment
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as long as there is good adhesion, the powder coat should last longer then paint and be more chip resistantseien Sie größer, als Sie erscheinen
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Have you stripped the chrome off yet? I would have them powdercoated. The powdercoating shop will also be able to strip them chrome off of them before they coat them, making for perfect adhesion. It's going to cost more, but it's going to be your best bet for durability.Comment
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there is a how-to out in google-land that gives a process that uses muriatic acid, big plastic tub, cooper leads and low amp battery charger to strip chrome.
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POR 15 is apparently UV sensitive, it can get a chalky whiteish color on it if left uncovered by a top coat. I haven't used much myself, though I do have some. I have no first hand experience, but I've heard of it.Comment
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Isn't POR 15 really toxic? Be wary of breathing the dust...
Although maybe not more toxic than "regular" auto paint or primer?Comment
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I was planning on taking it to a local sandblast shop where you rent a booth for however long you need it. My buddy took his wheels there once and said it worked magic on the layers of powdercoat on the wheels.Originally posted by Mr. Anderson View Post
This should work,no? Is chrome too strong to be sandblasted off?
The car is my budget winter beater and i shouldn't have even gotten euros for it but i couldn't pass up the deal.
Maybe i'll just leave it as is and have them p/c'd in the spring. We'll see.Comment
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chome is transfered to the bumper via electrolysis. I really don`t know if media blasting will remove the chrome.
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True, but technically, chrome is just a "coating" as well, and thought some type of media would be able to get it off. I've sandblasted OEM BMW tools that are chrome plated, but only the ones that already had peeling chrome, came off easily.
The bumper i'm getting is pretty rusted on the back side, so I may be able to blast it all off.
If not, i'll just sand and paint for now.
Thanks for the commentsComment
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blasting and priming the back would be fine to prevent rust, but sandblasting also tends to leave a more wavy surface if you paint or re-chrome it. Media blasing isn't as bad, but the acid/current ida seems the best bet if you want a smooth finish.
Either way, I would powdercoat the bumpers so they don't chip or fade as badly.Comment
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if you bring it to a powdercoater, they are gonna have the bumpers chemically stripped, its the only way to remove all chrome from the surface. It can get expensive.
POR-15 isnt made to be used as a topcoat, as stated it is UV sensitive, itll look like hell in no time. It lays down beautifully if sprayed out of a gun however.Comment
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POR-15 is a moisture curing polyurethane, so you need to be well-protected during spraying. Once it is cured it should be as inert as regular auto paint / primer, but curing will take longer than two component systems.Originally posted by tim88325is View Post
They do have UV resistant topcoat products.
Originally posted by whysimonComment
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DO NOT sand blast chrome off euro bumpers - it is thin metal & they will warp from the heat.Originally posted by BrewCity11 View Post
Taking chrome off is very easy - it uses the identical process as chroming, but in reverse. It's cheap, no materials involved, minimal labor, just a bath in three different vats. So, find a chrome shop & ask him to strip the bumpers. Most of these shops have the equipment to straighten the bumpers if they need a little work.
Then you prep them with a rattle can of self etching primer (SEM 39683), lightly finish sand & apply rattle can SEM Trim Black (#39143 - it is a satin finish) - reapply rubber trim & install bumpers.
A simple DYI - $30 strip, $30 paint & materials.[IComment
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