i think that orange on your nails is actually your nails turning yellow. this happens if your nails are constantly painted and if you use a lot of polish removal on your nails. even a base coat can't prevent all the damage to your nails so maybe let your nails rest more and use some nail supplements like the green tea stuff you can get at any drugstore nail aisle
my toe nails tend to turn yellow because i leave the polish on forever and ever...