How do I make a new pot look older?

You had a article on making a plastic outdoor pot look like it had mossy used look & I can't find it again. Could you send it to me please. I believe it was blowing bubbles with thinned acrylic paint. I am in AZ so now we can do outdoor activities. Would so appreciate the link so I could do this correctly. Thank you. Kathleen Neffenger

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