Kevin, A few guy spray a 15% soft wash mix after pressure washing driveways /concrete patios with pretty good results. I overlap about 6-8 inches and do not see the stripes but I use the 2502, 4 gpm at about 3,800 psi.
Also, if you ever need a replacement swivel for your hammerhead, there is a place right there in West Palm where you are called JN Equipment that I ordered from a few weeks ago. The stock swivels do not have the zerk grease fitting and are sealed bearings but the replacement that JN Equipment sells does have the zerk fitting.
powerwashstore sells a mosmatic swivel package that fit right on my 20" hammerhead. Unreal difference.
Maybe this can help resurrect some hammerheads until you replace them with other equipment. I have to agree with Ray the spinner that came with ours only lasted a season.