i find soap to be the BEST marking tool, can it be poured into a very thin puddle, then covered with wax paper when partially firm and rolled out to maybe 3/8" ?

Sounds like a great idea. My oldest step daughter makes homemade soap. I'll ask her.

i just use the slivers left when the bar is almost gone.

This would be very difficult to do. Soap is very fluid when poured. You'd be working with such a small quantity that I am not sure you could even roll it without it breaking.

I always use the sliver at the end of the bar.

Once my soap is set you have a nice hard bar..would not be able to roll it. Once soap is made you can pour it into what ever mold you like...small, medium, thick or thin.
Hope some one can help with the rolling out.
Shirley

In my VERY frugal days, I would save the soap slivers and when I had 5>6 of them, I would lay them on a glass plate and warm them in the microwave, slowly. When they got soft and pliant, I would put them in my hands and squeeze them together, to form a bar. Got a little more soap out of them, that way. You might be able to shape a point on a small piece. Good luck.

You can use several slivers in the microwave wrapped in waxed paper and be very careful. It gets really hot. Watch it every few seconds. Mash it real flat and let it cool.

I would just pour it into a mold the thickness that I want.

i too use the slivers that what made me think about rolling it out before it set of course then cutting, it seams like the marker makers could make it in a pencil or something.
once the the thin edge wears down you're back to a pretty thick line
thanks for the thoughts