I don’t know why, the switch plate covers in my home is getting dirty easily, become an eyesore when every time I tough it. So, I’m went to the electricity store and would like to buy the new one, however, they’re damn expensive! I’ve 5 of them need to renew, if I buy them all they costed me a fortune, therefore, DIY time!
1st of all, give them a bath.
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And then sand of the dirts by a thin sandpaper.
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I bought a Sliver Tamiya spray. And apply 5-6 layers on them.