If you use a washcloth or heaven forbid a rag on a stick like AC and a clean soap like Ivory this seems unnecessary.

A lot of women, my wife included, won't use a washcloth for some misguided reason but a decent thick one with a soap that doesn't deposit oil on your skin should do the same thing. If I'm gathering right from these links the purpose is to exfoliate and allow the cellulite to "escape through your pores". So, clean your damned pores in the shower then if your skin is dry apply whatever you think you need.

If it makes you feel better to "skinbrush" then just acknowledge that and enjoy it, but you aren't doing anything medically beneficial to remove cellulite.