Not my idea. But was advised by a fellow RV'r in Alabama. His was 1600 PSI...but recommended higher pressure, than his.
Just bought one of these. It is just great. Use it for all sorts of stuff. Except RV Rubber Roof. But great for mower deck, stripping loose paint off house deck, cleaning off vinyl siding on sticks and bricks, washing cars and RV. Pressure can be adjusted so it is not too strong for RV graphics. But can swith to rotating tip, to get strong pressure cleaning.
Can wash the RV in about an hour. Use the machine to spray on the soap. Brush it in. Spray rinse with high pressure. And you should see it work on the awning.
Actually bought a different brand that craxxed out shortly. Then bought this one off Amazon. This one is works really well.
I have no affiliation what-so-ever.
This is what I bought
'12 F350 SB, CC, SRW, 6.7 PSD, 3.55 RAR, 6 spd auto
2015 DRV 38RSS 'Traditions'
Pullrite Super Glide 18K
Retirement = It's all poops and giggles....UNTIL someone Giggles and Poops.