When applying an oil, less is definitely more and better to apply several light coats than one heavy coat. Because if over-applied the drying time can be very slow and also feel tacky.  A paint brush can over apply the oil and be the main  cause of a problem  so a  rag can be a better  tool to use.  We would recommend a 1st coat diluted with White Spirit/Genuine Turps  (30-50%) in most cases to help prime and help the oil soak in.  Once dry, several thin coats is always a better option, being ready with the soaked cloth to remove any excess oil.  When dry always wash out the rags well with detergent to avoid a the risk of spontaneous combustion.