Home Care - Grain Packs.... Which types are most helpful for whitening??

While watching YouTube for a while...

I became interested after watching videos of people using grain packs for home care...

I tried following along a few times... Wow... It's such a hassle... ㅠㅠ It's also a bit inconvenient when washing up...

I tried using rice bran? Or perilla powder?? But... maybe because I did it sporadically, I didn't see any significant effect...

Does using a grain powder face mask really help with whitening?

What kind of grain pack would be good?

Please let me know if you have any tips for making grain packs easier!!

(If I lay gauze or a sheet on my face and then make a grain pack and put it on top... it would nourish the skin just the same, right?? It does seem like it would be a bit easier to wash off that way...)