The right way to close up a welding project, Primer? Weld Through? Weld putty? POR15? Options

[ctc911ctc]

Hi,

I am looking for definitive guidance and perhaps a pointer to a thread on this topic.

We have finished all of the welding on metal that was primed with weld-through. We will now grind the welds. Is this the correct thing to do in this order?

Zinc Primer
Weld
Weld some more
plug up the holes with weld or epoxy (screw holes and small gaps)
Grind the weld and expoy smooth (smoother)
Treat the welds with 3M weld putty
spray another coat of Primer
Coat with POR15

Do I have this right?

Flame ON!!!! (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/ar15.gif)

[rjames]

POR15 works best directly to metal, as its a rust converter and is very "sticky

POR15 is not a rust converter, it's a rust encapsulate/paint. Por15 makes a product called metal ready that is a rust converter/etcher.

There are lots of threads on here complaining about POR15 products, but there is also a lot of misinformation like this that leads to their products being used incorrectly.

I used por15 on my floor pans 10 years ago, and it still looks like the day I applied it. But I also followed the instructions which include removing as much surface rust as possible manually, cleaning the metal (I used the Por15 Marine Clean product), applying Metal Ready metal prep and then applying the POR15 paint.

If you are going to use the product, take the time to do it right so your effort isn't wasted.