Years ago, I tried making pine trees using snips ( about 4 to 8 inches long) from a blue spruce tree. I trimmed the end of the cuttings to be a bit more conical, then dipped them in polyurethane varnish, and then sprinkled green-painted (or green-dyed, I forget) styrofoam shavings on the needles (which were the branches for the model tree). After drying, they looked REALLY good, so I "planted" a few dozen on my layout. However, after a month or so when the pine cutting dried out, the polyurethane wasn't enough to hold the needles onto the main stem, so they all fell off - and it looked like a wildfire had swept through all the mountains of my layout!
Does anyone have any good ideas for what I might use instead of polyurethane varnish to hold the needles onto the stem? I'd really like to hear from someone has actually tried something like this since I'm not really into modeling wildfire scenes after that last time!
Thanks in advance for the help!