Originally Posted by
strangerep
Depends how dirty the deck is. Take a damp rag or paper towel and rub it
over a small section. If plenty of dirt comes off, then simple hosing and
sweeping won't be adequate. You'll need to clean it properly with napisan
and oxalic acid (search back through this forum for details).
Then you need to let the deck become absolutely bone dry before applying
the oil. I.e: several sunny days or more (as an absolute minimum). In
autumn/winter this can get a bit tricky if dew keeps condensing on the
deck overnight. :((
The standard technique is to use sheepskin on the end of a pole.
Bunnings sells these. You'll also need a roller tray, or whatever, to dip
it in. Importantly, apply the oil very sparingly. Press the sheepskin on the
tray so it's not carrying too much oil. Then apply it carefully over a large
section. (I find that gently dabbing it over the section, and then going back
over to spread it out, gives more even coverage that's not too excessive.)
In the past, I've regarded the sheepskin as a throwaway (single-use) item,
because cleaning it is a pain. But they're a bit too expensive for that.
Recently, I noticed Bunnings have a cheap "pad painter" device where the
pad is replaceable, somewhat cheaper than sheepskin (and hence easier
to view as single-use). The device allows swivel, and is designed to screw
onto the end of a pole. You can get a relatively cheap aluminium extension
pole from Bunnings also. Both items are useful for other things
(e.g: painting high places). Also, having an extension pole means that you
can wipe the (drained) pad back over the deck after 30 mins or so to remove
any excess oil off the top. For best results, do one coat like this that's allowed
to soak in, then remove the top excess as much as you can. Allow to dry for
several days and then repeat.