I've seen this done on many amps, and I've decided to take my 4x10 cabinet in and have it done as it's about the same price to do this vs. Durex, and has the added benefit of being dry within minutes of being coated. My question is, once I have the surface of the amp all sanded down smooth, should I even bother with wood filler to fill in any small dings, dents or screw holes? I would think that the Line-X coating would pretty much render that step superfluous. Any thoughts? Thanks!