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Krylon Gold Foil Metallic Paint & Dwarvenite
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TOPIC: Krylon Gold Foil Metallic Paint & Dwarvenite
#57654
Krylon Gold Foil Metallic Paint & Dwarvenite 9 Months, 1 Week ago  

After biowizard helpfully linked to a golden room painted by law, I decided to experiment with Krylon's gold foil metallic spray paint on one of the dwarvenite half-walls.

I'll edit this post and update with pics later, but for now I thought I'd post and initial observation.

After spraying the front side of the piece, when I was checking it, the back side had several drops of a clear oily liquid. I'll report on tackiness after it's dried.

Last update:
It's only been a few hours, but it's clear that this approach isn't golden. There's an oily buildup on the piece, so this is the end of the experiment.

I'm going to go with the metallic acrylic approach.

Priming before spraying
I think I've identified the culprit in the Gold Foil spray. Toluene. Pretty common in a lot of primers and finishes too.

I avoided the spray primers that I have and brush coated with acrylic to hopefully keep the Toluene off the Dwarvenite long enough for it to evaporate.

Did the first spray about 20 minutes ago. At this point with the first experiment I had the oily buildup already. This time none. Also the finer details (the small indentions in the stones) of the first piece melted. It did create kind of a cool flat gold effect. This time the details remained.

The gold foil spray gives an effect that I just can't achieve with a brush.
cyberpenguin
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Last Edit: 2013/10/24 23:13 By cyberpenguin.
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#57660
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
I believe all Krylon paints other than the Krylon H2O line contain acetone to help with the paint delivery through the nozzle... I may be wrong about this, but I think acetone can be a bit rough on PVC. The solution would be to get a primer layer down before spraying. To be honest, the spray paints for metallics, stone effects, and a couple other specialty paints can do things harder to duplicate with hand painted acrylic.

If you want to take a second crack at it, I would say prime them for spray paints.
LordDust
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My players rue the day I bought "Dragon Mountain". Ever since they give every creature a bit more respect. You never know when the GM will decide that this group is crafty...
 
#57662
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
Thanks. I'll give it another shot tomorrow.
cyberpenguin
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#57673
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
Another possibility would be methylene chloride in the aerosol. They don't tell on the product pages what they use. But I did a quick search the other way round - trying to identify the best solvents to dissolve PVC.

Methylene Chloride comes up in the top 3 - well ahead even of Acetone. That also could make sense if you found drops on the back. That could be condensation of methylene chloride followed by it dissolving the PVC.

Dimethyl ether could be another culprit - but it shouldn't work as well. This could be a warning for any spray can use. Test out compatibility with the propellant.
Thod
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#57682
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
I'm really sorry about that. I Blame Law!!! ;-)
biowizard
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#57770
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
biowizard wrote:
I'm really sorry about that. I Blame Law!!! ;-)

The post really was helpful. Using a gold spray is going to give the best finish, and I wasn't even thinking along those lines.

The piece isn't ruined either, so I'm thinking it's a reaction with something that evaporated, and priming may be the solution.
cyberpenguin
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#57775
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
Keeblerorc
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#57788
Re:Krylon Gold Foil Metallic Paint & Dwarvenite - No 9 Months, 1 Week ago  
Keeblerorc wrote:
MSDS sheet for Krylon Gold Foil Paint...

www.paintdocs.com/webmsds/webPDF.jsp?SITEID=DBS&UPC=724504010500

That helps alot. After looking at the MSDS my guess was the Toluene, but I wasn't sure about the Cyclohexane.

This PVC chemical resistance chart seems to confirm it's the Toluene:
www.spilltech.com/wcsstore/SpillTechUSCatalogAssetStore/Attachment/documents/ccg/CBOOM.pdf

My guess is that primer will be successful in keeping the Toluene out until it evaporates. I feel more like risking another piece now that I know what reacted.
cyberpenguin
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#57804
Re:Krylon Gold Foil Metallic Paint & Dwarvenite 9 Months, 1 Week ago  
Thanks for sharing your experiments and I'm glad the priming offered an effective solution. In my area everyone else uses spray primers a lot that are pretty expensive (they are plastic safe, but around 15-20 bucks a can). It took me forever to find a brush on acrylic primer, only one Hobby Lobby in the whole area stocks it. My next challenge is to figure out what I can paint styrofoams with quickly and easily to seal them for spray painting with standard spray paints that does not break the bank.
LordDust
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My players rue the day I bought "Dragon Mountain". Ever since they give every creature a bit more respect. You never know when the GM will decide that this group is crafty...
 
#57815
Re:Krylon Gold Foil Metallic Paint & Dwarvenite 9 Months, 1 Week ago  
Keblerorc

Thanks for the sheet. I have a database at work where I can check the most likely culprit.

But it surely looks like a reaction of the aerosol with PVC.

Not at work (my day job) for the whole if next week - so this will take a while.
Thod
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#62075
Re:Krylon Gold Foil Metallic Paint & Dwarvenite 4 Months, 1 Week ago  
I split my game tiles in half and wanted to do half with a sandstone color scheme. To save time I purchased a can of Kylon Fusion (theoretically plastic-safe) in a terra cotta type color to base coat them.

The paint took to the tiles and did not melt them, but was tacky. However, a single layer of drybrushing removed this tackiness and after I did my 3 layers of drybrushing there was not a hint of stickiness or shinyness.
Undel
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#62391
Re:Krylon Gold Foil Metallic Paint & Dwarvenite 4 Months, 1 Week ago  
I use black latex house paint to prime foam.I use a very large brush.
Oldmanwillow
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