Firstly thanks for the responses so far
The rust seems to have worked its way all the way around the wheel arch..... in most places it is just bubbling under the paint but for about 10cm's it has actually broken open and you can see the crack in the metal....
My car is always garaged and taken very good care off.... But then again I don't know the life it has had in Japan..... Mechanically my car is very sound, but I am getting a little rust.... I suppose thats the risk you take when importing cars
I will look into all options but I would still be more comfortable in having it cut out so I know its gone for sure....
Keep those replies comming
Thanks