Also it's best to wash any clear coat when the temperature of the surface is cooler as the surface is harder and less chances of scratching the surface , always start by rinsing the trailer first then ,wash sections starting at the roof then lower sections, washing with the grain ,not scrubbing in circles and rinsing your wash mit or brush offen ,this avoids scratching as dirt is abrasive, it's best not to use a power washer if you don't have experience with them as they could do some damage , I have a gas powered washer 2500 psi and on full throttle with a strait nozzle installed it can cut asphalt ! If I'm going to use a pressure washer I use the fan nozzle reduce the engine speed ( which reduces water pressure) and stay back from the surface. When someone says wash with the grain ,look at your airstream and you will see a pattern in the finish ( corner)end caps grain is on a angle , middle end cap panel top to bottom vertical,side of trailer left right horizontal .
2012 silverado ext cab 4x4 ,5.3 L , 6 speed trans,3:42 final drive,tow package standard box 6 1/2 foot . 2014 honda forza 300 scooter, #2 2015 honda crf 250 L (Dual sport)