By . Air Compressor. At Friday, August 10th 2018, 09:33:06 AM.
A rotary screw compressor uses screws to force the gas into a smaller space. These can be quite compact or larger for industrial uses. The tighter the threads on the screws, the greater the compression. This type of compressor does tend to run a bit smoother and with less vibration than other types.
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.
A few years ago I got a letter from my cousin back in Florida. He is a portable air compressor too. He works with a roofing company contractor. I could never do that sort of work because I am too big. Luckily, my cousin is just the right size and can be used up on the roof. I guess the workers just take him right on up and secure him to their roofing jacks. This seems dangerous to me, but different strokes for different folks.