By . Air Compressor. At Sunday, September 16th 2018, 03:17:32 AM.
The most common is the piston compressor. This falls under the positive displacement compressors, which you can find in fractional to very high horsepower ranges. The positive displacement air compressor works by filling an air chamber with air and reducing the chamber volume.
An important factor is also the factor of oil. The oil is used for lubrication of moving parts of the compressor, but it also has some side effects. For example, traces of oil can be found in the tubes that deliver air to your airbrush tool, so it can be mixed with paint. This problem is more pronounced if the compressor is older. One possible solution is to purchase an oil free air compressor.
I returned to the job site with my new goodies and soon discovered that I had indeed made the right choice. The compressor started right up and was soon pressurized and ready to go. I hooked up the hose and gun, filled the reservoir with stain, and started systematically applying it to the siding. The portable air compressor was on wheels, and easy to maneuver. I could see the dry wood soaking up the stain and I was happy I'd opted for this method of application. I dreaded the idea of having to brush stain on for hours on end. Once I had the first coat on I let it set for a couple hours while I took a break, then went back out and applied a second coat. This probably would have been sufficient, but I had read that the very best thing to do when applying stain with a sprayer is to go back and brush over the job. Doing this really drove the stain into the wood and allowed it to fill every little pore.