• Hi Guest!
    You can help ensure that British Car Forum (BCF) continues to provide a great place to engage in the British car hobby! If you find BCF a beneficial community, please consider supporting our efforts with a subscription.
    There are some perks with a member upgrade!
    **Upgrade Now**
    (PS: Subscribers don't see this gawd-aweful banner
Tips
Tips

painting over por15 - advice needed.

Share this page

J

jackag91

Jedi Warrior
Offline
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.
 
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.
 
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.
 
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?
 
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?
 
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.
 
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.
 
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.
 
Back
Top