I've always run a small filter / trap on my compressors to keep moisture out of the tools mainly, as mine gets used mostly for air tools not painting.
They are really cheap at Machine Mart - about £6, but then you need a couple of adaptors for a few quid each to suit your compressor / hose. Don't forget a bit of PTFE tape on the threads. I have mine inline at the compressor end, some painters have them at the gun end.
https://www.machinemart.co.uk/p/clar...ni-air-filter/