So I am new here and have not yet even started painting. I'm still in the collecting materials phase. I have a question about brushes. I was given 4 Winsor Newton Cotman brushes for watercolors (6, 10, 12 which have a round beveled tip; a 777 flat brush; and then a 1.5" brush that says "Flat Wash"). So basically I'm wondering if I can use any or all of these for oil painting or if I should just sell the lot on ebay? I already have the recommended brushes coming. Thanks in advance.