W-D 40 up under the plastics and frame and just about anywhere under there you want to spray it makes rinsing mud off a snap and keeps stuff from rusting as quick too!
I just skinned my Brute and I am glad I did, there was mud and sand for days up in it.
I would pay double or tripple for easy off skins, It's a hassel and lots of bagging screws and bolts.