Like has been said all carbon knives will rust

I still greatly prefer carbon over stainless knives

I hunted all day in this rain with a knife forged of W2 I tried to keep it dry best as I could and no problems  my rain gear hangs over my knife and I use a product called tuff glide as a rat preventive by Sentry Solutions. I have used this product on guns and knives from Asia to Alaska and I have been very pleased

Don't store knife in leather sheath

The maintenance carbon requires is well worth it

I wipe my 1095 blades frequently with olive oil.  Baricade will work, but who wants to slice a pepperoni and taste Baricade?

I've used Vaseline on my dive knives in the service and out.  A thin layer keeps them sharp and rust free.

I like the sound of the mustard patina, that is pretty cool!

As as has been mentioned, lots of carbon knife fans intentionally put a patina on the blade to protect it from rust.  Googling something like 'forced patina' should get you in the right spot - I know the topic comes up frequently on Blade Forums and so forth.

If your carbon knife gets some rust on it, hit it with steel wool and get that patina going.  Keep your tools in good shape and they will serve you for a long time.

Ive not had any issues with mine, Ive had it for 4-5 years.
No rust yet.
I take care to keep a light film of protective oil on all my knives.
FYI

QuoteOriginally posted by Fish Finder:
The Mrs got me a GFA knife for my birthday and I am having a heck of a time with it rusting. ...

as mentioned countless times already by other posters, you do not have a problem, you have a really Really REALLY good knife.  i've used my gfa frontier skinner more than a few times over the years and it's my go-to do-it-all knife these dayze.  the quality and value (not to mention the great looks!) of gfa knives is unsurpassed, imo.

Are these the same knives that he was selling stamped DMP which I think stands for David Palmer.  I bought one from him at Compton years ago and they all look exactly the same, almost like they were stamped out.  Is this the case or are they individually hand made?

I really like the one I have.  I don't carry it but I use it daily down in my work shop. It's my go to knife down there.  I think I only paid $15.00 for it at the time.  It is a great buy for the money. By the way, mind has never rusted.

I suspect the knives are made by Dean Oliver of Oregon. They are identical in every way to his work except for the actual blade shapes, which would have been designed by Asbell.
All Dean's knives are completely hand made in his shop.

Guy

I have a few Asbell knives, and never have a rust issue. I wipe all my knives down with whatever oil is handy....3 in 1, Hoppes, whatever.

All carbon steel will get rust spots, especially if you leave blood or sweat on them.

They appear to be a stock removal blades.   Forged blades generally cost more due to the time spent on forging them.  Lots of knife makers have a line of stock removal blades they can sell at a better price point.  Good knives at a great price is the result.

I enjoy this knife and think it will make the long haul with me. It does not hold an edge as good as some of my others but touches up very quickly and gets very sharp. And it looks great.

I put some petina on it today with the mustard and I may do another round of it. I enjoy the way it is looking. I just need to get a new sheath for it from somewhere and I'll be all set to go.

Good old carbon knives develope a great patina naturally and if taken care of will not rust further.

Here is an old butcher knife second from left with a natural patina. This knife has been used by me for the last 31 years and I bought it used and is used in general camp chores.
   

This little 56 year old Western has natural patina.
   

Here is after roughly an hour with mustard. I just put another coat on to get some real rich marks.