I cleaned them down with lacquer thinner,then touched up the damaged spots in the wood with stain (don't bother the small scratches) then I sprayed them with some monarch lacquer sanding sealer,using a cup gun aka conventional. After a short drying time I sanded using an slightly worn 80 grit sand pad,but don't use 80 grit! I use 80 because I am used to it so try a pad but a less corse one,blow them off with an aircompressor then it's gloss time baby!!! again I used monarch. The sealer and gloss will need thinning but how much depends on the way you spray,airpressure and gun. Most DIY would do a light sanding then a coat of poly another light sanding then a final coat of poly. Poly does look good and is easy but looks a bit like plastic