Slapped some seam sealer on, will smooth this off before I paint it. I think it had started to go off a bit in the tube, as it was a half used one. No skirts on the Phase 1 so below the ridge line of the sill is just black underseal, Silver paint above. The join of the paint/sealer is covered by a chrome sill trim. These actually rot less being open to atmosphere...less trapped moisture.
While this was drying I did three patches on the top of the OSF inner wing, where the wing bolts on. Didnt take any pictures but they were flat patches, quick and easy. Then I turned to the OSF wheel arch, has some old repairs in here that still seemed OK, but then I looked at the chassis rail in front of the wheel arch...oh dear me

A small poke resulted in the bottom of the chassis rail falling apart so I just went in heavy with the grinder!
This resulted in me having to take the loom out that runs through this chassis rail and also let me to this absolute horror. The brake fluid res sits on the front of the NSF turret, spilled brake fluid from its early life has run down the arch and along the chassis rail and stripped all the protection off, and... this is right under the brake master.
I started cutting out the rot but ran out of time. Note to self - 30 year old sound deadening catches fire REAL easy when its within a foot of the 'exhaust' stream of a plasma cutter lol. This is going to be a tough repair, complex shapes and awkward access.
Dreading this one if i'm honest.