HI, Stan....and you're right; BOTH hand lay-ups OR chopper gun applications, if done poorly, will result in a sub-standard finished product - it has everything to do with the economics of low-cost labour in a labour-intensive product (and how well that labour has been trained).
Chopper technology is fine for the purpose targeted by Speedster body makers; to produce relatively low-cost car bodies of acceptable quality for the intended market. Baking them post build to insure "straightness" is simply one alternative - vacuum evacuation is another, and letting it sit for a long time is a third. All three work, just some faster or better than others at different time and cost points.
That's exactly why Ted Hood (a Big name Boat builder, formerly building boats in Rhode Island) is now making his boats in Turkey for two reasons: 1.) The labor is very well trained there and far cheaper than similar skills in the 'States or Western Europe and 2.) the finished product is closer to the intended market (he sells far more of his product in Europe right now than enywhere else).
You're also right about post cure "waving"...Depending on how (and how long) the piece was out-gassed (cured) and, often, how long it's allowed to sit in the sun if it wasn't fully outgassed properly, a fiberglass panel may exhibit some waving over time until finally cured. The trouble with using a long-block sander to remove the waves is that they may be deep enough that you begin to get into the mat layers, and then have to skim with filler to get a proper, smooth surface. All of that takes time (and costs money, too!) MUCH better to "bag it" in an evacuator bag for several days to fully outgas it, or bake it for a while (evacuation is more expensive than baking). Lots of the really older bodies had neither, as the industry was learning from its' mistakes.
Costs are what killed the American boat building industry - it is VERY labour intensive to build a boat, so the majority of higher-end hulls (and, now, a lot of the super-structures) are built off-shore. The same holds true for Speedster (and other car) bodies.
We're living in a Global economy....you go where the costs are less in order to compete with the intended quality, and, usually, shipping costs from East Zamboogy are less than in-process labour costs in the 'States.