It looks like decorative cake icing, but it is 'tacky' over the raised seems, taken before I put Krylon Matte spray on it. If you read the instructions for that stuff, it says if you apply too many coats it will make what you spray it on look 'whitish'. It did that on the interior alright, and this time it is going on the wings and other 'dark sea blue' surfaces. The illustration I am going by shows a lighter blue than that for the wings.
Progress on this has been slowed by an upgrade to the 'model cave', as my daughter calls it. I acquired a used, but nice, 6'x3' office desk, with a thick, very heavy, particle board & Formica top and metal frame with a shelf above it and 2 drawers. Getting it installed by myself was a chore, but it is much better than the folding card table I was using.
1 attached image. Click to enlarge.