I have an early porsche 911 dashboard to recover that has a horsehair moulding/pad on it, its in pretty good shape but has sort of slightly compressed into dips and is a little lumpy and bumpy.I don't want to replace as getting the shape would be difficult.I tried 3mm foam but the lumps just showed through? My next plan was a thin cover of closed cell foam and sand to shape.
How would others do this?