Today, I tried again to get the spray paint off the black top and concrete island. I sprayed brake fluid on with my awesome Awesome container and had no real luck. I let it set for about five minutes then used a hose to hose off. I also tried to use a scrubber, which did not seem to help. The middle picture I used gas and a brillo pad the other day.
At Wylam, this is what it looked like before, on my frp and lexan sign.
I sprayed the brake fluid on and scrubbed it lightly.
It did not come off the frp that great. But on the lexan it was perfect.