i can only comment on the bandanna...thats a great idea...in my line of work i wear a hard hat so for me to "wear" and expect it stay blended and undetectable is an issue, not to mention dirt building at the front..so i always wear one at work..
any how i would advise to wear a well worn, faded, washed out (color wise) bandanna.
this is from experience..the bandanna i had been using just always seems to bleed color when i wash it. i had not realized this until one day when i got home and removed it i noticed that i had a slight bluish hue at my hairline. i guess the glue absorbed the color fortunately it did nothing to the lace base...