No, I just did an egg wash, let it sit for a minute then sprinkled poppy seeds on.
I've got one or two other ideas to try, I may do a followup experiment the next time I make hot dog buns. (We've been eating a lot of hot dogs lately because I made a big batch of tomato relish last week and it is SO GOOD on hot dogs when it's fresh!)
My wife agrees with me that other than the oil version, they all had the seeds stuck down fairly well.
There really isn't much honey in the honey wash, I couldn't taste it on the bun I had for supper. (I had one from the honey group and one from the oil group, seeds kept falling off as I was eating the latter, so that method is a total failure.)