i prefer fine tip mechanical pencils- i've never had pencil not wash out- and a mechanical pencil stays sharp-fine point- i mark as lightly as i can and still see it- most of the time it is possible to see the pencil lines even on dark fabrics- when i'm not using pencil i use chalk....everything else i've had mixed results from-some don't come out for me-
pencil and chalk always does---that being said---what ever you choose-always test to make sure it's going to come out before marking very much-some fabrics seem to really like to (hold onto marks)