trick for clean white walls

I couldn't clean my old white walls for the life of me so I gave up and I was planning to double wide them with a flap disk and my angle grinder and it gave me the idea to use my sander on them with some 80 grit paper and it worked awesome! I am not sure If it will make them more vulnerable to UV damage but I will post if it does and I did not have to be careful other than not to hit chrome it was crazy easy and they look fresh as fuck just waiting for the rain to stop next week im plannnig to coat them with WD40 long term rust prevention and put my fingers in a dyk and pray haha
I just painted my old beat up old:thumbsdown:spinners with blaze blue plasti dip

this is just something I haven't heard of anyone doing before so I figured I would share and if you have any tricks it would be interesting to see them

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