Pretty simple. Instead of using the pu method (spelling out) or nasin sitelen kalama (moras), spell names using syllables from the writing system sitelen sitelen.
Here I write my own name: soweli nanpa Tonpite. I do this by using the ton-pi-te syllable glyphs from sitelen sitelen.
This way you write a name neutrally with a singular unique representation, so that you can spell their name from pronunciation or sitelen Lasina without using glyphs the named one does not prefer.
Additionally it helps show how a name is written and pronounced syllable-per-syllable without requiring reverse engineering from the spelling or pronunciation of various words.