So I coated the complete underside of the body and the inside of all four fender and running boards with black Raptor. I am finishing up on the very last of the paint work and wanted to coat the wheel-side of the inner fenders but found that all I had left on the shelf was tintable Raptor. I could find no reference data on what tintable Raptor looked like if you opted to "not tint it". Well here is what it looks like...just about the same as it does in the bottle...I thought that it might dry clear but no such luck.
This was sprayed with a 2.2 nozzle HVLP gun to get a smoother texture and less build up, base is black KD3000.

 

Charlie, were you able to spray the Raptor without any additional thinning using your HVLP gun? If you did thin it out more that just the adding of the hardener, what did you use and how much did you thin it per bottle? I have never been able to reduce the texture as much as I would like using the spray gun that is made for the product even using additional thinning.

 

You could always shoot black epoxy primer over it.

 

I have a Devilbiss Finishline FLG4 spraygun with a 2.2 tip/nozzle. It is a great gun for shooting primer since it will spray 2K primer without needing to thin it. I followed the UPOL guideline for reducing the Raptor and went with a 10% mix using House of Kolor RU-311 reducer. I used the HOK reducer because that's what I had handy, I certainly would not go out and buy a quality reducer for this job...any urethane reducer would work just fine. I use 3M PPS gravity feed cups and in this case I removed the internal strainer screen to improve flow. The Raptor was still thick but it did spray out, I sprayed the panel with the gun at about a 4 inch distance. Texture was about that of leather. After the Raptor dried I sprayed the panels with HOK KD-3000 black primer/sealer...now it really looks like leather. My goal was to add durability to the inner fenders without adding a lot of texture...I think that I got what I wanted. One thing that I did learn, if you spray this product with an HVLP gun instead of the Shutz gun, then be prepared to mix a lot smaller quantity...a little goes a long way. As an added note...if you have a cheap Harbor Freight gun you can drill out the tip/nozzle large enough to give you the flow you desire, there is a video on YouTube showing a guy spraying the underside of a sports car using a modified HF gun and it seemed to work fine. I bought the new UPOL Shutz gun with adjustable tip that gives you a lot more control over the texture as well.

 

Here is a pic of the inner and outer inner fenders, this shows the Raptor as it is now coated with the KD3000. The close up pic shows the granularity of the Raptor finish.

 

Thanks for the info. Your texture looks more like what I was trying to get with a standard Shutz gun but have never been able to achieve. I'll have to try using one of my cheap HVLP guns with a large nozzle to see if I can replicate your results. Thanks again!

 

Charlie,
Another one of your great informational post that I need to put in a folder for quick access later. Thanks