I redid a camper using marine enamel and a quality camel hair brush. Two coats of primer and two coats of enamel. Yes, if you get close you can see brush strokes, but you have to get really close and most of them are in the primer. The darned thing is too tall to get in the garage, and spraying something the size of a small house was not practical in my little back yard with the neighbors and local laws. It just wasn't worth sanding the primer on currogated aluminum, but I think if you did you could get a very high quality finish. Marine paint is made to be brushed or sprayed (no solvent pop) and it flows out very nicely with a quality brush. You don't get the durability of catalyzed urethane, but marine enamel isn't exactly crappy paint either - it has to endure heavy sun, salt spray, water, etc. At least one company has a clearcoat that can be used over the base for an extra level of gloss. I can't see it being any more work than lacquer was and what you loose sanding off imperfections, you gain by not having overspray. You may not get the depth with marine paint that comes HOK or other premium automotive coatings, and metallics/flakes are out of the question, but there's no reason you can't get just as high a quality of surface finish with them if you invest enough time and get good materials/tools. And how much depth was there back in the 30s/40s and early 50s with most regular paint jobs, especially if the car spent time at the local track? For someone who has more time than money, and can't legally spray urethane in a residential neighborhood, it could be a real alternative for some projects - not all of course. Flattening agents are also available if you're intersted in a suede look. I encourage anyone to give it a try on something - toolbox, scrap metal, whatever and see what kind of finish you can get with a little work. I used Interlux Brightside which is a 1 part urthethane enamel. There's also a two part that is supposedly more durable (Interlux Perfection). (http://www.yachtpaint.com/LiteratureCentre/topsides-colorcard-usa.pdf)The System Three linear polyurethane line has a gloss clear topcoat in addition to the water-thinned basecoats (http://www.systemthree.com/reslibrary/literature/WR-LPU_Color_Card.pdf).