She has a definite Australian accent but I have never seen this neither. I bought a similar brush and eye dropper with the intention of using it to paint with dye onto fabric. I bought them both in the craft section of what you call a dollar shop. Happy hunting.

I don't do applique, however my cousin does and she uses an ordinary small brush, starch in a bowl and a skewer and a regular iron. I guess any port in the storm.......

How about liquid starch in a bottle?

A stiletto or the flat s die of your seam ripper will work just as well also. I find I use my seam ripper a lot for other things than reverse sewing.

Hello:
A "few" years back in a needle turn applique class the instructor suggested the following.

Draw the pattern on the freezer paper, trim. Place the pattern piece dull side down on the back of the fabric. One could use a bit of washable glue or one pin to hold it in place. Trim, leaving 1/4 inch around the design. Then using the small iron turn the edge up over the shinny side of the freezer paper. It will stick to the shinny side. Cool a bit and remove paper. She had made untold number of applique quilts and there were others that used this method. Applique turned out to not be my favorite thing.

I've tried the freezer paper several times unsuccessfully, when wet I didn't find the shape firm enough to wrap over.
If I'm going to use the shape less than 10 times I use manila folder paper, more than 10 I make a mylar heat proof template.

No special iron, just my big one, but NO steam

That is so neat.

Missie Carpenter from Traditional Primatives carries the brush that holds starch, she features it on many of her patterns/ projects. I use it often preparing EPP pieces and some applique. It works great.

the two pronged tool looks like the little impl;ement you use to pick lobster out of a shell.

Yes! I had to go and see if I still had some of those, used to eat raw oysters! YUM! I would just use the elmers washable school glue pens, they are refillable, so you could use starch mixture when glue runs out! No need for a brush really, just squirt it on til the fabric wet!