OK, just an update for future use for others.
I have now done 6 reels this way - one more to go in next day or so. 2 80Ws and 5 50Ws in total. All on hollow dacron. A few points;
The reels that had the most use have the corrosion on the spool. May sound obvious. But they have all had the dacron on for same length of time and all been in salt water. But generally I fish solo and only use 3x 50Ws. I have done 2 of those and corrosion on both spools. The 2 other 80s (used occasionally) and 2 other 50s (used when I run 5 rods - outriggers), are perfect on the spools. So it is the amount they are used, not the time the line is on them.
The power wash, as in pic seems to work very well. And I soak in warm water for an hr or two before that. The compressor drying - hooked on to the hose fitting on spool, seems to work very well. I am re-spooling next morning after blowing the water out. The outside is dry, the inside may be damp, at most, but definitely not wet.
The canuba wax, I am not sure about - at these temps (25-30 deg) it is semi liquid. not sure how much it will do for the spool, but I am using it anyway.
In addition I have painted the cleaned corrosion spots and then clear nail varnish.
Ready for big fish again. Rain and wind due to clear by end of week.
Regards from Vtu.
Alan