Firstly you will need to sand the whole of the existing worktop to remove any old treatment and scratches and stains, start off with 60 grit sandpaper working up to 220grit for the finished surface. When this has been achieved the surface needs to be fully cleaned and all dust removed so it’s ready for your chosen treatment.
If using Linseed or Danish oils, Pour a small amount of the oil directly onto the worktop surface and using the lint free cloth, spread it over the surface until you have a very thin and even layer that covers the whole of the worktop.
For hardwax oil follow the same process but use a suitable paint brush and ensure each coat is as thin as possible.
Once you have the thinnest possible layer of Wax or Oil, allow to fully dry before commencing a second coat, never over brush the wet surface.