I was going to surface clean a customers concrete, but they said it had a clearcoat on it. I wasn’t going to use any chemicals just the pressure from the surface cleaner, is there anything I need to be concerned about.
You can drop the pressure down to about 1800-ish, do a test corner first. That’s all I can offer.
Here in Florida we have a lot of concrete driveways sealed or painted with oil based. I don’t use the surface washer on any of it. Light pressure with the wand and don’t go to close to it.
Since is sealed there is no dirt in it.
Do a test on a small area for the mix if you want to use it. All depends on what sealer they used.