Hi. I will be painting a 1937 Ford Tudor Sedan the late Spring. I want to spray it a single stage urethane Bright White. I have a 21 gallon compressor. I bought a HVLP gun, but was told it won't work because of the compressor. Was told to go LVLP. Then was told that I could only do panels. I would like to paint it myself, because I did everything else by myself. Can either of these guns work for me?? Thanks.