Does anyone have experience working with Whipped Cream Frosting under Fondant?

I am just wondering if Mock Whipped Cream Frosting is stable enough to go under fondant.

I have an order and need to frost, cover and decorate a cake on a Friday night and then deliver on Saturday morning early.

If Mock Whipped cream frosting IS stable enough to put under fondant, does it taste good? Can I leave it out overnight at room temp without it going bad?

Please help.....