That is so good. Have a source for that? I might include it in my presentation.
I got it out of https://www.aup.nl/en/book/9789089643735/inside-out-victory-boogie-woogie Amazing book. Also describes how he used tape (a new invention at the time) to adjust his composition before painting it. He died before finishing the painting 🖼️ , so the tape is still on there. Visibly!