I am battling "fish eyes" in my finish. I know they are caused by contaminants but I for the life of me can't figure out from what. I Is there any way for the pump oil from the reservoir on the kremlin pump to leak into the line?

Are you using kremlin oil on your pump ? Is this new wood or refinished? I run into fisheye a little bit on a refinished stuff , I use fisheye eliminator from Mohawk it is good stuff

I did not for a short period of time but have been the past 6 months. New wood

Of course it can leak in if the seal is bad. I use simple Mineral Oil in my Kremlin cup. Never a problem with it.

Put a small compressor on it, don't use the same air line to connect it in. If you have a different high pressure line swap it out.

Try spraying with an HVLP gun to see if the room is the issue.

I had issues years ago when a car detailer close by would spray the tires with a product loaded with silicone to make them shiny. It would shut me down for the day. Doesn't have to be much to get fisheyes.

I like the idea of using a small compressor separately. I have ordered a new water and oil trap too. Just was not sure if it was even possible for oil to come from the kremlin pump or not.

That way you isolate your main compressor from the equation. If you use an oil less compressor that takes oil out of the equation and a small compressor you can just empty the tank of water and not even use a water filter for a short test.

The only small one I have now is a little jobsite version but it should let me see if the other one is the cause. Thanks

the oil that kremlin uses in an inert oil, the way you can tell is that you basically dump an entire bottle into a cup and spray with it and i very much doubt you would have any issues not being a smart..s just what i have been told by others who i trust. also the design of the packing wipers would not allow bypass into the system especially with the the pressure strokes of the pump. the other point to consider is to get a mirror and take the air line of where it enters your pump and see what comes out along with a white cloth, these tricks have helped me in the past, best of luck going forward as i know this can be a real pia.........

I just spoke with a kremlin tech and he said it is impossible for the oil to enter. Which is good but back to the drawing board. Next step is to eliminate the current compressor and try an oiless one. Is there anything I can run through the air line from the pump to the gun to clean out any of the contamination.

Run several different thinners through the line. Acetone, Denatured Alcohol, Lacquer Thinner and MEK if you have it. No way to scrub it on the inside.

air lines are so inexpensive, harbor freight would be a good choice. did you try the mirror and clean white cloth yet?

I have not. I am on a cruise until next Tuesday

Sources of fisheye contamination: the person spraying? Are the hands washed, no oils from the hands? Hair goop, Brill Cream, Dippidity Doo, hair conditioner, hair oil? Underarm deoderant? Pizza?

Do you use wax anywhere in the shop? Diesel fumes?