Hello Ezrec, welcome to the forum
This is the first time I heared of meringue for 3DP printing (sugar, maltodextrin and PVA are all I have seen thus far) and the idea seems interesting. The link you provided doesn’t go anywhere to me, so I can’t see your results, but using egg powder seems on first glance that it has potential.
The procedure you described is clear and should be reproducable on a Plan B. I am really tempted to give it a try when I resume printing experiments. I will show results if I have tried it.