Just take off the caps, the left one (as you sit on the bike) may be under a little pressure as it is the one with the spring under it, but it is not much. Then undo the drain plugs at the bottom of the forks and drain out all the oil. A more thorough way to get all the oil out is to remove the forks themselves and turn upside down and drain the oil straight out of the top of the fork, but that involves removal of mudguard and wheel etc. Refill with some good 5wt fork oil, I use Maxima over here, 300cc per side I think, and reassemble in reverse. I have a .PDF document about Paoli forks and how to change seals etc, PM me your e-mail if you want it.
this is what canada 315 told me to do
i have been told since to use 10w but the 5 w in mine is fine