Well, this I didn't suspect:
After starting a thread http://cs.trains.com/forums/1398814/ShowPost.aspx about the two matte finishes, I went out and bought another can of krylon. However, it is "Low Odour Clear Matte"....not what I had at first, because that was all that was available at the local Walmart.
Well, the low odour stuff may not have a smell, but it is also not very matte. It left the structures with almost the same sheen. And I shook the can continuously and applied as directed
The labels are almost identical. I hope this has not completely replaced the old smelly Krylon.
Don't get the low odour stuff.