There has to come a point at which you just move on. I've scrubbed that gearbox for about 10 hours now, maybe more. I've used tardis, g101, surfex, and today tried metal polish, aluminium wheel cleaner, and steel wool. I am aware there is a risk of cleaning fluid seeping through the seals and contaminating the transmission fluid so I've kept it quite dry.
I want the gearbox shiny, but not as much as I want the car on the road. And I can keep cleaning it here and there. But short of actually starting to grind the surface, I'm going to have to live with it being about this shiny:
You can see the masks placed up on the engine bay. I'm going to finish detailing the engine bay in the next 3 sessions, and change up the gear cables so I can rebuild.
I can't show progress pics; its too messy. I gave everything a last degrease with G101, wiped down with paper towels, masked off everything I could, gave a light rub with sandpaper, and wiped down with a tack cloth.
I then gave a first coat of POR15 to the following parts, using a paint brush for the main part. This was VERY ginger work, I changed gloves often as a few pairs of gloves aren't worth a paint splash in the wrong place, I changed brushes, worked very slowly and gave myself a sore back from being too tense. In about 4 hours I managed a first topcoat on the following parts. I used a cotton bud swab for the very fine work and to 'blacken' areas like the cam cover mount - i.e. the kind of pitted metal, just rubbing it down with the cotton bud and POR15 gives it a nice patina. For these parts I'll just leave it as is. Its not rusting, POR15 will seal it, and make it look better. For a few of the parts, they are just staying black. For others its an undercoat before I put gold or red on.
I just think its proven good at sticking to not perfectly clean surfaces, it sets rock hard and seals, it works good to blacken anodised metal thats looking tired, and of course it prevents rust spreading - so what could be better.
After the first coat I was very pleased with the results, but a second is definitely needed:
Lower engine block, prongeron, water pipe, fuel pump mount, dipstick tube:

- The prongeron & dipstick tube will possibly be gold.
The back rigger:

- Its going to be gold too
The clutch lever, mounts for the gearbox, trunnion, and airbox mount:

- Clutch lever will be gold
The side area where the coolant tank mounts and the DIS:

- All of the grey was going to be gold. I'm leaning towards less use of gold and more of these pieces staying black.
The other trunnion and the metal pipe behind it:
The metal brackets behind the headlamps:
And all the bolt heads and pipework under the oil filter:
Not pictured is the underside of the sump, any other visible and clean parts from the underside, the top of the radiator mount internally with the chargecooler & oil cooler sides & mounts. I used the rest of the can up on the radiator mounting kits:

- Side brackets will be red
Thats me back up to posting in real time now. Tomorrows plan:
Second coat POR15
Decide what is to be gold
WD remove bonnet & work on stress cracks
Create engine shroud
CD refit fans & new radiator
After 2-4 hours, paint gold over appropriate bits
Loosen cam cover
Paint engine top block, plenum chamber, unpainted parts in silver
Remove gear cables, do another clean to the back.
Swop masks, paint brake lines & brackets red,and mask up back firewall, spray it red.
Call insurers and see whether I can't get a new windscreen.
Its hard to really appreciate how much difference this is making. Effectively each time you black something out, it 'disappears'. The overall effect once everything is clean, polished, dressed, etc should be stunning. A before and after pic will show so much more than this incremental picture business…..
Last night I finished checking off all the hose clips, pipes, conduits, sleeving etc needed and ordered the remainder of my engine dressing parts, together with 4m which I hope will be enough vaccum tubing which should arrive Monday and by this point I hope to have all the paintwork done, save for the red around the clamshell and the bonnet interior where there are some stress cracks to cover.
I measured everything with vernier calipers and while it may not be 100% neat as its done in oily scribbles on a clipboard, I don't mind typing it up if anybody is interested in this info.