It's hard to see it but I do have a spray on rubber coating on it to help with gripping.If you find it slippery when wet just coat it with some bed liner.
I did that on my factory petals and it helps make they "stick" to your shoe a bit better
It doesn't show good in the pic. but I left about 1/2 inch between the pedal and the center panel.But it does get a little closer as you apply the pedal, I maybe could have left it about 1/2 inch shorter but I was worried about getting my foot wedged in between the panel and the pedal.I'd worry about getting a stick jammmed in between the pedal and the side and holding the throttle open.