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MG MGA - Frost chassis paint

Has anyone used this product on their chassis?

I painted my chassis with it 3 months ago and the paint gas still not hardened and can be scratched off with a finger nail. I keep thinking it will harden given enough time but beginning to wonder now, as it has numerous sessions in the sun to bake it.

Would appreciate anyone's experiences with this.

Chris.

Chris Bond

Was this supposed to be a two part paint, like Acrylic Enamel? Acrylic enamel needs a catalyst to get dry and hard, otherwise it will never set up properly. It is normally mixed 8:1.
Edward
E B Wesson

It says single pack quick drying synthetic enamel with a tack free drying time of three hours on their website.

It seems you got some from an incorrectly mixed batch or something Chris.

I guess it is thinned with white spirit (chassis black enamel usually is, it should say on the tin). I suggest you try and wipe it off with a rag soaked in white spirit, and then try again with another paint. I use chassis black because it's cheap and easy with a strong finish. You can buy 5l tins from any auto paint or parts supplier. The only problem I have found is that is is not resistant to petrol, so I use two pack for the fuel tank and any other parts that might get fuel on.
Neil MG

Spoke to Frost and they say that they have not had any other complaints from this batch.

Tried to claim it must have got contaminated but that is not possible.

Their advise was to over paint with POR15! But that won't work as it has poor adhesion to anything other than etched/rusted bare metal.

Not in a position to wash it off now as chassis is completely rebuilt, so have got to try and find something to overpaint which will cure but not react!

Argh! Why didn't I use POR15 in the first place?

Chris.
Chris Bond

I'm not too keen on POR-15 these days, either... I've currently got in my shop for repair, a bumper and tire carrier set off my Jeep, which I built 4 years ago. I sandblasted, wiped down, applied POR-15, and then herculiner over top of the POR to provide the UV and stone protection. It had seemed to be holding up okay, but in the process of preparing the parts for repair, I have been peeling the POR and bedliner combination off in sheets using nothing more than a putty knife/scraper ad an aid. It turned out to be a stroke of good luck since I wasn't looking forward to stripping the coating off chemically or abrasively, but it doesn't really sell me on the material for future use. I have had mixed results with POR-15 over the years, but I really thought I had the prep and application down to where I could trust it. I will be hauling those parts to the powder coater once I have the repairs made.

-Del
D Rawlins

Chris, I believe you can over paint with POR 15 if you first rough up the original coat of paint with sandpaper. Is the Frost at least hard enough to do that?

I'm surprised that Del had a problem with POR 15. Its been on my chassis for 3 years now, and still looks great. And a friend put it on a GTO about 15 years ago, also looks great. I wonder if it was the UV that deteriorated it in Del's case?

George
George G.

I'm not sure what the deal is. There is still POR-15 on my Jeep that is holding up okay. And actually, the stuff on my bumper appeared to be, until I started scraping. Once I got under the edge, the rest pulled off easily enough. Part of it might be due to having used a relatively thick, flexible bed liner as a top coat; It may be that the Herculiner helped hold the POR together so it could come off like that.

It's also possible that my post sandblast prep work wasn't as good as I thought (or remember). But when I first took the scraper to it, I originally hoped to just get the bedliner off, and planned on dealing with the POR using more tedious methods. It was kind of a surprise that both layers came off like that. But as I said, fortunate in this case.
D Rawlins

I should also add, that the Jeep lives a much harder life than any MG does, and is far more exposed to the elements.
D Rawlins

This thread was discussed between 08/08/2014 and 17/08/2014

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