I was excited with the results from using Awesome Orange All Purpose Degreaser on my frp. http://cwguy.com//?p=1121 So I was looking for a better value, Might Orange is 33 oz where Awesome is 22 oz, both $1.
I applied the same way holding the bottle like the left picture and squeezing. This time after about 10 minutes I tried scrubbing with a brush. It worked about as good as just using high pressure water, maybe a little better.