Composite Bed Cleaner

I tried searching, but couldn't find an answer.

I had some 2-stroke fuel / oil blend spill on the back of my truck a while back after hauling my ATV. I took a power washer to it and scrubbed it, seemed to get most of it out. However it still looks like its stained on there pretty good.

Question is: whats a good de-greasing agent that wont harm the composite bed?

I was thinking Simple green or goo-gone

I'm sure i'm not the first to spill a little oil on the bed.

Thanks

 

Power purple is tough also

 

i spilt gear oil in my bed. i used shout to break it up and spray it out. then i came back with amor all whipes

 

No bed mat?

 

simple green should do it, vary the strength and length of time as needed