SteveMMM

Get a Leader Hose, use it only on your power washer, drain it out after each use. Garden Hoses have a lot of gunk in them. My HVAC Company used a lot of the Karcher’s and we got a Rep. to give us tips on their use. Also never leave it Plugged in with the water shut off, and clean the inlet strainer often

I asked a Paint and Body Shop, this question. They said to never get the Power Washer Jet any closer to the Paint than you could comfortably hold your hand in the Jet. Also they said Purple Power would remove any wax, and was somewhat harsh on the Clear Coat and Paint. BTW, I asked this for Oil Based Paints, I believe modern paints are made water based. They are great for removing Road Salt, from the Body, and undercarriages. Makes it quick and easy during the winter. I also use a Foam Gun, may modify the Power washer so it has both the Gun and Wand. Gasoline here, much more Versatile for other cleaning projects.