You cannot, it's too thick and should not be thinned.
Supposedly, you can use these tools with ANY type of paint, so long as it has the right viscosity. I found that these plastic pumps can't withstand the pressure of normal interior paint without thinning. The tubes bulge and the seals leak. So, that is why I don't like these pump-action tools for ANY application. That advice applies double to any thick "one coat" paint.
You remove the head and put on an extension that goes into the paint reservoir and pull the plunger back. I actually used the tool as simply a paint plunger since the roller didn't work for me.
NO. These don't work well for any high-viscosity paint, and epoxy resins can soften the plastic tubes, making them even more likely to leak. Also, clean up would be a nightmare. Epoxy requires chemicals to dissolve. Unless you had some way to pump gallons of noxious poison paint thinner through that tube, you'd have to throw the tool away after use. I'm not convinced the plastic and rubberized components would even withstand exposure to epoxy at all.
Yes, you probably could. These only work with thin viscosity material, and most stains qualify. But it seems an inefficient tool for that application.
No. It is not suitable for thick viscosity compounds.
No you cannot.
I painted a stucco home with cedar trim, and found this to be a perfect fit for cutting in atop ladders. The knap is not heavy, but just pump out the paint and make a couple passes.
ANY LENGTH IS OK HOWEVER. REMEMBER THE FEED IS FROM THE INSIDE OUT. NO CORE NO FEED FOR THE PAINT. THE ONES I USED HAD THE ROLLER CLOSED ON BOTH ENDS, ONLY THE FEED TUBE WENT INSIDE. IF YOU WANT TO SPREAD OUT THE PAINT YOU CAN USE THE FLAT PAINT PAD
Yes, the edge guard wheel rotates to help you with the changes in direction cutting in a ceiling requires.