POR15 and oil tank outer surface

[Neil '67 911S]

Is there a general consensus about using POR 15 on the outer surface of an oil tank?

I'm thinking of one coat of POR 15 and a top coat of POR chassis black (satin finish).

Thanks!

[66S]

POR 15 wont stick to anything but a rusty or a roughed up surface. If you put it on a smooth surface it will likely peel off in time. A good auto urethane like Glasurit is just as good or better on a non rusty surface, it also likes a rough surface or use an epoxy primer for adhesion and extra protection.

[John Straub]

Oh...I was just about to do the same thing. Has anyone used the "Eastwood" Extreme Chassis Black?

John

[Neil '67 911S]

I've decided to show off the copper and use instead of POR 15, one of their other products called Glisten PC. It's a high temperature two part clear coat. Like the proper application of POR 15, you prepare the surface before painting. In the case of POR 15, you apply Metal Finish, which is a zinc phosphate solution. In the case of the Glisten PC, you apply AP-120, which is formulated for a polished surface.

FYI, on the 356 forum, there is a tread running regarding problems folks have had with the Eastwood POR 15 like product. You would probably do best to stick with POR 15 or Robert Hirsch products.

[Kaefer]

When I refurbished my '71 tank I ended up using POR-15 on the outside of the tank. Of course prep is the key (using their Marine Clean and Metal Ready zinc phosphate solution).

The zinc phosphate etches the surface in preparation for the POR-15. I had no issues with the POR-15 flaking off.

[Neil '67 911S]

I stand corrected. Metal Ready not Metal Finish. For those who have had experience with POR 15 flaking, when in doubt read (and follow) the manufacturer's directions. Plus, POR 15 has a 800 phone number and staff ready and willing to answer any questions to help you out.

1-800-726-0459

They are in New Jersey.

[Kaefer]

I stand corrected. Metal Ready not Metal Finish. For those who have had experience with POR 15 flaking, when in doubt read (and follow) the manufacturer's directions. Plus, POR 15 has a 800 phone number and staff ready and willing to answer any questions to help you out.

1-800-726-0459

They are in New Jersey.

X2. If you follow the directions carefully the POR-15 won't flake...even on rust free metal.

[John Straub]

Ok...I'll ask. Do you guys think POR15 or and a urethane with an epoxy primer for adhesion would be better?

John

[Neil '67 911S]

Hi John,

The best thing to do is to follow POR 15 manufacturer's directions. Prepare the surface for paint by first using their Marine Clean product followed by their Metal Ready zinc phosphate solution product.

According to the manufacturer, POR 15 can handle the heat of the oil tank. I don't know whether you could say the same of a urethane primer. Someone else would be better qualified to answer that question. I had also initially thought about using an acid etch primer to be follwed by POR 15 before I researched the product better.

POR 15 is mighty glossy stuff. If you want to tone that look down a bit, top coat it with the POR 15 product called "Chassis Black" which is a satin finish designed to go over POR 15. You need to scuff up the POR 15 surface with a red scotch-brite pad (320 grit) first according to POR 15 staff.

[John Straub]

Thanks Neil,

John