painting over por15 - advice needed.

[jackag91]

I have been working on my tr6 body tub for a while now and I think it is finally ready for me to paint the inside. Since this has taken me about 6 months of my spare time, I have been painting each section with Por15 as I go.

The end result is my body tub is covered on the inside, underside and engine bay (basically any part that will be covered by a body panel or upholstery) in cured por15.

I am hoping to start painting the car early next month. Here is my game plan for the engine bay and inside the tub.

1. use a scuff pad or 400 grit sand paper over the entire por15 sections.
2. use a seam sealer
3. lay down a layer of primer
4. sand
5. color followed by a clear coat with flatner added

The underside and wheel wells will be covered in a Linex
product.

The body panels, front, rear and the decks will be professionally done. So, I haven't really touched these.

My questions:
1. Do I need to do anything other than above for the por15?
2. Any recommendations for particular brand/type/etc of primer/base/clear?
3. Does anyone have a recipe for Triumphs Mallard Blue?
4. Anything else I am forgetting?


I can try and attach a file to help explain the sections.

 

[1965_MGB]

According to the POR15 site, you should use the tie coat primer to insure that there will be good adhesion between the POR and the new paint.

I have looked into this, as I am in the process of removing several layers of bad paint down to bare metal, and starting the POR process.

 

[Mark Jones]

I used POR15 extensively on my Spitfire restoration this past winter and top coated it with their tie coat primer as they suggested and all is well so far.

I did the priming and painting myself and the autobody place where I bought my paint recommneded 5 Star's Xtreme 3 in 1 primer, which can be used as a sealer, norm or high build primer. I found this product worked really well and it was nice to only have to buy one primer; a lot less chemicals sitting around in my garage. As for paint I used BASF Limco urethane, which I found easy to apply.

 

[jackag91]

Thanks for the input. I guess I will go ahead and pick up the tie coat. I was trying to figure out if it was needed or if people had better luck with other products.

It should be a fun week.

I forgot, any recommendations for seam sealers?

 

[Popeye]

How sandable is POR-15?

I guess I never thought of this idea... there are a few of us restoring on nights/weekends, and there is periodic discussion on the BCF on how to preserve metal until it is ready for painting.

Why not just POR-15 each panel as it is completed? When all are complete, spray all panels at the same time (and get uniform color). My only thought is how to get a brushed on coating smooth?

 

[Steve_S]

The POR web site has lots of info on this. Also, don't discount the POR topcoats. I've used their Black-Cote and Chassis-Cote and they come out very nice.

 

[jackag91]

From my experience it isn't all that sandable. That's why I only used it on sections that weren't clear coated (or polished) originally.

 

[1965_MGB]

I found that sanding POR15 is tough to say the least. I have been using it for a while now, and found that a cheap airbrush hooked to my compressor gives a nice even coat (after some practice of course). I used the topcoat on the battery cover on my B as well as some other small parts that I had used POR15 on, and I really like the results.

I am planning on using the POR topcoat when I do some restoration work on my hard top. I talked to the guys at POR, and they tell me that the topcoats are really good for anything that is put in the sun or any UV rays.