First Load Up The Model.2.Right Click On It And Click on "Override Materials".3.Right Click Again And Then Click "Show In Element Viewer" and then "Model".4.You Shoul Have A Button That Is Yellow,Click The Plus Beside It And Then Right Click On Any Part and then.5."Add Attributes"Then "Color"And Then You Wanna Type In $color .7.Color The Part Whatever You Want .8.Enjoy :)