That is why I am here and that is why I am still here...

It's only second day of treatment, no changes in behaviour and the fungus is still there. I have done the second dosing of both Melafix and Pimafix.
Though yesterday I have noticed some long trails of poo hanging out, so gave her half of a frozen pea (with the shell taken away) to get rid of constipation. Will give the same on Saturday and Sunday.

wow, never knew about this. it doesn't seem human to me putting Kara completely into this hydrogen peroxide solution though I know that we do not mean any harm to the fish. I might consider doing the first method you have mentioned.

Hope Kara gets better soon I can't offer any more advice than what has already been given really, if melafix and pimafix don't heal it you could look into getting some stronger fungal medications. If hasn't changed within 3-4 days of treating it, you should try something else.

Best of luck

April: It's not natural coloring, I assure you But it can take months for all those spots to go away completely Nothing to worry about

Max: I am treating one of my fish for fungus as well, it's the 5th day of treatment, and it seems to be disappearing I'm using the salt I recommended to you! I agree with Minde's methods, if this first dose won't work, you should definitely try it out

I hope it continues to heal Max, good that it is not progressing. Thanks enjoy your weekend too.

Nossie this is good to know that it will just take time thank you.

Nossie, it means you have a goldie veteran living in your tank. I can imagine how the fish tells the stories of its adventurous youth to younger siblings or neighbours...

Yeah soon I bet Orbitz will be telling my future orandas and black moors. Of how to behave and what too eat!

Hi Max,
This is what I did:  get everything ready before you take the fish out.  Pour a little hydrogen peroxide in a little container.  Have a Q-tip next to the hydrogen peroxide.  Wet a washcloth or small hand towel.  I kept my fish in the net and placed on the wet towel, while still in the net.  I used a "white" net, smaller hole less abrasive than the standard green ones.  It works quicker and better if you could have someone hold the fish while you apply the hydrogen peroxide.  Hold the fish gently but firmly on the wet cloth, in the net.  Dab the q-tip in the hydrogen peroxide and "paint" it on the fin with the fungus.  Dab and paint until the fungus area is covered.  Be careful not to get full strength hydrogen peroxide in the gills or eyes!  Should take about 10 secs the most.
Carry the fish back to the aquarium and gently place her back in the tank.  I would leave the lights off for awhile until her next feeding time any way.

You have to hold the fish firmly, as she will try and struggle some and you may end up with a shower.
Yes, I would use a bit of tank water to wet the cloth. 
Look for improvement by the second day after treatment.
If it is not smaller still you may repeat the treatment again but I think you will see improvement and about the 3-4th day the spot should be almost, if not gone.

Ok, thank you very much once again, tomorrow is the d-day... I will keep you updated. I strongly believe this might be a better solution than Pimafix.

Well, except for the long poo, she looks great!
I really think that due to the amout of stress she was under, being taken from her environment while you administered the touch of hydrogen peroxide caused her to release more poo than usual!
Anyway, if I were you I would break up her feeding and feed twice a day instead of 1.
Goldfish are naturally grazers, hence the long digestive track.
Small meals more frequent are better for them instead of 1 large, which can lead to constipation.
Peas are good also, as a treat besides the regular meals.
Goldfish graze apon plants and algae throughout the day also.

Thanks, will follow your advice.

Max, the darkening might be from the slight rise in the nitrites.  some fish are sensitive to even the slightest bit of change in nitrites from zero to a tiny bit.  Nitrites are a form of less toxic but still ammonia present in your tank.  Don't worry about the darkening at this point.. it is harmless and a sign of healing, much like a bruise we would get.
I wonder if you would consider a bigger tank in the near future which would be so much easier to keep the water quality more constant, and especially since Kara has grown.   75% of ammonia present in the water is from Kara just breathing which the ammonia is excreted through the gills. With the water temperatures being higher, Kara is breathing more and her metabolism is higher thus creating more ammonia in the tank. 25% of ammonia is excreted through excrement or poo, which the ammonia then is changed into the nitrites.  adding a bacteria booster every time you do a water change, right to the filter media, and a more often water change will be more beneficial to Kara.

Fin rot would be the opposite, paler edges of the fins And they usually tear up before they turn pale.
She'll be just fine if you'll keep doing the regular water changes and the rest like normal.
I really hope your family will agree to a larger tank! They make a wonderful addition to any room in the house