Picture ledge lengths (Paddock Wood, village TN12)

You can see the effect in the picture - this was achieved with lengths of picture ledges from IKEA (MOSSLANDA). It was originally white but we painted on it to match the wallpaper, however we stupidly didnt prime it so the paint is flaking off in certain parts. For this reason I would imagine it would be fairly easy to bring it back to the original (or repaint possibly?).

There are 2x 115cm lengths, 2x 55cm lengths plus another two 55cm parts that were cut to make the angle.