Veebyes wrote:
I would not worry too much if it is only a 1500PSI, usually electric, washer however I would not waste money getting one that weak.
I have a 2500PSI gas washer used primarily for boat bottoms, house roof, concrete driveway. Effective but nowhere near a good as a 3000 or a 5000PSI. Get yourself a nice soft brush, a decent length adjustable painters staff from Lowes or somewhere, a bucket of of soapy water & go at it.
Much more effective & safer for the graphics than a pressure washer. The only time mine has seen a pressure washer is in TOK, Alaska at a fuel station there where you can wash your RV after you buy fuel. Feels like a 3000PSI but I keep my distance & use it to get the chunky bits off then rinse after brush & soap.
Used an electric 1500 on the roof this year, worked great. Added Oxiclean to the soap water, soft brush, pressure washer rinsed and it's like new. I'll keep the gas for the truck, shop & driveway.