It is my understanding of this high temp silicone technology that there are a few issues.
1. The powders are rated anywhere from 800 deg F to around 1200 deg F.
2. The powders are typically utilized in the BBQ grill market.
A few things to consider. When even these powders are brought to the high end temps, the technology is pushed to the limits. When it is at the limits, the powder begins to break down thus shortening the life of the powder system. Not to mention the fact that most of the coaters use phosphate pretreatment systems and at these high temps, the phosphate coating loses its functionality.
One considerations also is that these powders are typically poor performing from a UV perspective. This means that you will get fading and breakdown of coating over exterior exposures.
There are two heat exposure situations. Long term and flash. In long term exposures, alot of damage can occur. Bubbled up surfaces and overall breakdown. Flash is when the coating is quickly heated and then cooled down immediately. This is often what we see with a show bike or a custom car that is trailered to events for show only. They are fired up quickly for show and then they sit most of their life in shows etc.
Some of the highest end bike builders in the country will swear that ceramic coating is the only way to go.
One more bit of info...due to the heat....powder mfg are very limited to the pigments (colors) used in the powders. That is why you are limited to more darker systems (dark green, brown, black, some silver etc).
Hope this helps a little.
Travis Stirewalt
TIGER Drylac
Travis Stirewalt, CSI, NASF
Senior Sales Manager, Eastern US
TIGER Drylac USA Powder Coatings
www.tiger-coatings.com