these are two completly different finishes. Picling consists of rubbing a thin layer of paint or stain over the raw wood. Youcan use just about any paint or stain and thin it out as little or as much as you want and then applying it on the raw wood with abrush and then wiping it off with a rag. Whitwashing is made up of 4 steps toachieve a antique look. There are different ways to do this but I find this way works very well. Fist paint the piece with a white latex -semi gloss- paint.Let dry comletly, then sand the entire piece with i80 grit paper. Then sand the corners and edges with 100 grit so that the bare wood shows . Try not to get it too uniform.Now you will have to sample on some scrap wood for this next part to find the right colour stain.Try it with a walnut shade to start. thin the selected stain out about 15 to 25 percent and then apply it to the sanded wood witha brush, then all you do is wipe it off with a clean rag, and presto you have an antique finish. Good luck.