That is a neat way to get speckled eggs,
Would be nice to use brownish eggs and coordinated dye
to get that distinct monochromatic look of speckled eggs.
Our family tradition brought over from old country.
Brown onion skins boiled with water & vinegar make a nice egg dye. Color can vary by amount of time the egg sits. Do need almost all the papery skins from a five pound bag though...;>) Don’t recall the exact amt of vinegar, but think it was about a half cup.
We were allowed to play with setting the lightly colored eggs in soup spoons for a few minutes to make a darker section. Turned out a lot interesting patterns.
Dad also cut 1/8” or so strips of drafting tape, masking tape of any kind also good. We taped them on the eggs, longitudinal, cross hatch patterns, you name it. Interesting color effects when used with Paas dyes. Table usually had about 5 or 6 Paas dye bowls. Tip, let eggs dry before re-dyeing another color, otherwise you get muddy mess.
Rapidograph india ink pens can be used to trace what ever patterns one prefers on eggs before dyeing. See Uktainian and Russian Easter eggs for examples. Less tedious than hot wax striping.
Fun, as long as one doesn’t mind the cleanup. Those little wire hoops are a must... Or make your own from wire coat hangers.