However the following directions (mine) might get you there:
Access
Access in itself is a bit of an epic, you scramble down a rough track down the south side of the gorge. Park in the South Side car park near the hut and follow the track to the hang-glider ramp, then past the “No access” signs down a rough but wide gully. Descend down this heading roughly east, eventually you find rough steps and cairns. This track leads to Mushroom Rock which is unmistakeable, then swings left (west) and across ledges on the south side. Look for cairns and some scrambling is involved.
Eventually you get deeper and deeper in the gorge, heading in the direction of the chalet and reach some fixed ropes which you can go hand-over-hand. Angels’ buttress is easily seen from here, so get your bearings.
The fixed ropes descend into trees which you basically downclimb in the gully and follow the ‘creek’ bed steeply down further (I recall some misleading cairns on the left facing out) and eventually scramble up and out left, then come up from the right side of Angels buttress (looking up now) to scramble between some boulders and reach the base at a small stance under a tree.
The route starts up and left from here at some flakes/corner which leads into a handcrack above.