I have done a few sets and 100% agree with the above.
It takes much longer than you thing, it took me 3 days to do a set, sanding them down and getting them free of imperfections, you can get a good finish but you will always get some bit of grit or dust in the lacqure as you spray which will drive you nuts.
before
after
i would say it cost me around £60 in materials and 3 days, compaired to £200 done professionally, never again!