I hope this note finds you well. It is a beautiful spring and it is the best time to re-oil the exterior of your door(s) if they are sealed with my varnish/oil. The primary villain of door finish deterioration is ultraviolet light. By re-oiling your door once a year you will prevent the "aging" of the doors surface.
This is what I recommend to restore or maintain the exterior of you door:
Wash or dust the exterior surface 24hrs before you will apply the oil.
Purchase a quart or more of Preserva-Wood (Natural), or SuperDeck 1910 Natural Oil, or TWP Natural, or Penofin transparent (Red or Blue Label).
The mixture is 3 parts penetrating Wood oil (or the oils mentioned above) to 2 parts Exterior Gloss Spar Varnish ...... I have changed this for more durability
I recommend that you check with a local building supply rather then a paint store
You should mix in the oil based exterior spar varnish. (i.e. Mc Closky's Man-0-war spar varnish) till well blended
It is NOT necessary to remove door but place plastic or cloth tarp under area where the door is to be oiled
With a brush ......... apply liberal amounts of oil to
exterior view of door. The inside usually does not require
Keep surface wet for 45 mins to one hour. If surface becomes tacky or sticky ...... simply apply more oil and it will become viscous.
Take soft, lint free, cloths and wipe the excess oil off of the surface of the door.
Check back several times for "bleed out" (shiny) spots and wipe them off.
If you wish to give it a second coat, it is very important to wait at least 48 to 72 hrs before repeating the process.
Please let me know if you have any questions
Fine Woodworking August 2005