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PPG Hi-Temp 1027

393 Views 10 Replies 5 Participants Last post by  MJuric
We are building a material handling system for a heat treat furnace. The customer recommended a paint that is no longer available and PPG recommended we switch to a Hi-Temp 1027 paint. We tried to spray today and the paint is coming out a bit like spider webs. I'm personally not the painter but I'm the one responsible for making sure things get painted, so here I am.

We are using a Binks gravity feed spray gun and running around 80 PSI. Our PPG rep said to thin the paint but we have already thinned it quite a bit. Just wondering if anyone had any other suggestions I could have the guys try. I dropped a few pictures below to show what we are getting.

Any Help would be appreciated. Thank You,
Grey Water Tints and shades Pattern Rectangle
Grey Road surface Asphalt Concrete Pattern
Road surface Grey Asphalt Concrete Tar
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Did you strain the paint?!
Yes, generic cone filter which we use with all out other paints.
I don't know the product and others here have way more experience with both product types and spraying than I do. But it honestly just looks to me like paint sprayed on a dusty/dirty surface, including maybe some cobwebs.
Surfaces are all "Clean", as much as a large metal weldment can be. They came directly from the grit blaster and were not sitting around. The surfaces definitely do not have cob webs on them. However, like I said, when painted it does look like it.
Check the expiration date and in general, under what conditions it was stored. I had a similar case with a web. The paint stood in a cold warehouse for a very long time.
Will do.

Our PPG rep said the following.

1) Thin the paint more see if that works
2) Could be the fact we are using a gravity feed spray rather than a pump spray. He seems to think the gravity spray interjects more air than a pump spray and could introduce the effect we are seeing.

Thank You
PDS says to Not thin. What did you thin it with. ? Weird it looks like roller lint. Sure your guys sanded it? Other thought is that the paint was probably sitting around the warehouse forever and that is unmixed tint or hardened tint spitting out ,or the likes..
Thinned it with R6 K 30 Sherwin Williams (MAK). Distributor said this was ok to thin with.
I'd be inclined to start by using PPG's Amercoat 65 as your thinner and omit the R6K 30, despite what the distributor said. Maybe @Redux or @NACE could shed more light on the chemistry differences between the 2. I know that Sherwin's R6K 30 is MAK, whereas PPG's Amercoat 65 is comprised of ethyl benzene and xylene, but I don't know enough to tell you whether or not they could be used interchangeably in your situation.
I think you pretty much nailed this. We brought over our paint supervisor from our sister company to look at this. First thing he said is not to use the MAK. To oily/Sticky whatever. We Buy Sherwin Williams SW-1 Lacquer thinner in 55gal drums but use it for cleaning mainly. He mixed in ALOT of that making it much thinner than we had it. Adjusted the gun, started spraying and Voila! fixed. Been painting all day without issue.

Appreciate all the comments.

Thank You
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