RPM long term results

vintage chromoly · Feb 22, 2020

hello all.
I’m restoring the rear suspension on my coronet. This includes the springs and perches, backing plates and hardware.

I have some RPM, but I’ve only used it on the heater box hardware so far.

Does anyone have any relatively long term results?
I’m looking for reviews on parts that have been coated with this product and have been in service for a few years or so.

Thanks

Wietse · Feb 23, 2020

Never heard of it, but if this is one of those coatings for chassis etc. i can tell my experience with POR15.
Decided to use this after reading up on it and found a lot of good comments for durability and corrosion prevention and inhibiting.
Specially after shot blasting use their metal prep, after that treatment you wash it with fresh water and you will notice a light brown rust color comes up.
POR15 adheres very well and becomes a permanent coating. (be carefull to not get it where you don't want it!)

https://www.por15.com/

vintage chromoly · Feb 23, 2020

I wouldn’t put POR 15 on a lawnmower deck.

VANDAN · Feb 23, 2020

vintage chromoly said:
hello all.
I’m restoring the rear suspension on my coronet. This includes the springs and perches, backing plates and hardware.

I have some RPM, but I’ve only used it on the heater box hardware so far.

Does anyone have any relatively long term results?
I’m looking for reviews on parts that have been coated with this product and have been in service for a few years or so.

Thanks

Vint Chrome, not meaning to hi-jack your thread, but I am also interested in using RPM for some parts on my '63. I've used it already, but it hasn't been time, or weather tested yet, so I can't comment on that. I'm wondering how it may work on new exhaust pieces, to include the pipes, mufflers, and hangers ? Concerned the repeated heat will just burn it off, or worse, dis-color and smell while burning ?

Jerry Hall · Feb 23, 2020

vintage chromoly said:
I wouldn’t put POR 15 on a lawnmower deck.

Why? Please explain.

Kern Dog · Feb 23, 2020

POR 15 is not preserving the natural color.
Rust
Preventative
Magic .....
is a coating that embeds into the surface of the metal like a shield but since it is clear, the color and texture of the metal is still visible. The goal of the use of this product is to allow the part to look natural without forming surface rust.

BSB67 · Feb 23, 2020

Kern Dog said:
POR 15 is not preserving the natural color.
Rust
Preventative
Magic .....
is a coating that embeds into the surface of the metal like a shield but since it is clear, the color and texture of the metal is still visible. The goal of the use of this product is to allow the part to look natural without forming surface rust.

A bit of an oxymoron. The natural state of metal car parts is rusted. I do like the look, but in reality these things began rusting before they got to the dealer. But I'm not an original car guy, or a car show guy.

5wndwcpe · Feb 23, 2020

I'm a big fan of RPM. A few years back I did a double blind study by coating a few pieces of freshly blasted steel with RPM, Boeshield T-9, Par-Al-Ketone and a few others. I left them (as well as one with no treatment) outside over the winter to see how they would fair and by far the winner was RPM.

I used it on the backing plates on my '57 about four years ago and it's held up well. Perfect ? No, they are a few speckles of corrosion here and there but far, far better than it would look had I not treated them at all.

All that said, I don't think it's some revolutionary concoction, but mostly paraffin wax with some pixie dust and unicorn piss thrown in for good measure, but it does work.

For those unfamiliar, application involves heating the part to be coated up to 125* and brushing the RPM on. It soaks into the pores of the metal, then re-solidifies, thereby sealing them up. For this reason, I think using it on anything that gets hot, like a brake drum or exhaust pipe would result in it just melting and running off.

vintage chromoly · Feb 23, 2020

I’ve had to deal with cars that were POR15’d and it was a nightmare.
It sticks like glue in areas and peels in sheets in others. Same car, same substrate.

If I want something black and protected, I use a catalyzed enamel.

The intended purpose of POR15 (paint over rust 15) is to apply the product over wire brushed rusty metal. Maybe it’s good in that application, but it has no place in my toolbox.

Jerry Hall said:
Why? Please explain.

5wndwcpe · Feb 23, 2020

vintage chromoly said:
I’ve had to deal with cars that were POR15’d and it was a nightmare.
It sticks like glue in areas and peels in sheets in others. Same car, same substrate.

If I want something black and protected, I use a catalyzed enamel.

The intended purpose of POR15 (paint over rust 15) is to apply the product over wire brushed rusty metal. Maybe it’s good in that application, but it has no place in my toolbox.

My experience as well. For every person on the net that had positive results, there's two that had the stuff peel off easier than a prom dress.

Wietse · Feb 24, 2020

I believe that is where the POR metal prep comes into play.
I creates that fine rusty etched surface, and that is where POR15 gets really stuck on.
I also used it once as a top coat over some other random paint and peeled off.
It is a system on its own, which is not unique by far as other paint brands do the same.
I have done my suspension parts with POR15, leaf springs, control arms etc and so far not a single spot of rust to be seen.
And i did drive it once on a rainy day with salt on the road after taking it from a car show.
Everyone has good and bad experiences i guess with different products.

RPM long term results

vintage chromoly

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Wietse

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vintage chromoly

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VANDAN

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Jerry Hall

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Kern Dog

Life is full of turns. Build your car to handle.

BSB67

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5wndwcpe

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vintage chromoly

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5wndwcpe

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Wietse

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