traditionally because Faux Fur is a polyester or Artificial fiber...it doesn't take dye a bit or at all..and if you treat it with heat or too roughly it will get all matted *which sounds like what you're experiencing*
also, when doing the sharpie dying, make sure to wash it a few times till the water runs clear after letting it set for a few days, This will make sure it doesn't bleed onto your clothes or when wet
Anime USA 2015...Halloween!
Steven Universe- Rose Quartz Gown version
Evangelion- Asuka Langley Soryu Yellow Sunddress
Magic Night Raye Earth- Ferio Yellow Shirt Version
Yuri Kuma Arashi- Kureha Bear Form
Yuri Kuma Arashi- Kureha OR Lulu School Outfit
Artist's Alley Hopeful....We'll See
Awesome Con 2016
Deadpool/X-men Comics- Siryn...not sure which version yet...
DC Comics- Raven Either Teen Titans or Original Comics version....