I sometimes peel butternut squash especially when the recipe calls for it anf I often peel the stalks of broccoli especially where it is too fiberous!
If the fruits or vegetables are waxed, then you might want to peel them but generally you want to serve most organic fruits and vegetables unpeeled as many of the nutrients are contained in the skins.
You can pare the rotten and wormy parts off but keep as much of the food's exteriors intact as you can.
Does that help?
Thank you, very much.
Bruce Paine