Was having a look at the link Frank3k, noticed they do 1/700th scale ones so I don't think there would be too much of an issue doing 1/350th
Are there actually any ships done to 1/285 scale ? I was trying to figure out what scale that is, I think it's 1/4"=6'-0"
1/285 is a wargaming miniature "standard", with lots of white metal armor and aircraft (and a few small ships) to go with it. It's annoyingly too far from 1/350 to mix the two without it looking off.
I know that there are 1/700 Shapeways models, but they were probably designed to print at that scale from the start
The problem with rescaling the 1/285 aircraft is that the wings (or other thin features or small details) may fall under Shapeway's minimum printing dimensions when scaled to 1/350. I doubt that a 20% reduction in size will trigger this, but it would depend on the original.