I used Johnstones Trade Wood Primer and Grey Undercoat for the base layers, sanding between each coat to try to get a smooth finish. The hull is painted "Victory Red" and "Black", and the waterline painted white with Craftmaster Signwriting Enamel
I made a frame to sit the boat on, using my laser level to project a level line on the boat and after an attempt to paint to this line, changed to sticking a masking tape layer along the line to get a decent line. It was really difficult to paint a line over the chines!
I used Craftmaster Signwriting enamel for the Upper structure - in Silver Grey, Charcoal and Raw Sienna - unconventional it maybe, but at this point I'm not planning to add any fittings to the boat, other than Port & Starboard lights, but am very tempted to paint FIRE and add the RAF Roundels - maybe after I've done running trials!
I've still to fit the rudder mechanism, but filled the prop shaft and rudder post with grease, and tested the RC, and it all works, so 🤞 for a water test in the bath soon!
Do I add polycarbonate windows - or do I need airflow through the boat?

After a very long pause 🙄, I have resumed work on the Crash Rescue Tender.

I found and tested the new electronics I'd bought:
Controller: M-Troniks G2 Hydra 50
Motor: M-Tronics Brushless 1900KV 600can (came with Controller)
Antenna: Futaba R3106GF
Rudder Servo: Futaba S3004
Batteries: 2 x VP Racing Battery Ni-Mh 10x2600mAh 12V
Transmitter: Futaba T6L Sport

and found the new hardware:
Prop-Shaft: 9” x 5mm dia. (8mm dia tube) with bearing
Rudder: Brass 5mm shaft

Having stripped the paint from the boat, and removed the old propellor and rudder tubes, I set about fitting the new propellor and rudder tubes.
I made a new motor support to ensure alignment with the propellor tube.
I had to enlarge the prop tube hole to 8.5mm to ensure the resin would flow all round the tube for the best seal
Having never used this type of resin, I went for Z-POXY 30min 2-pack, sealing up the outlet of the rudder tube with blu-tak (with space for waste that I would file off once set) and made a small frame from thick card to contain the resin in the hull I drilled a hole to ensure resin got all the way into the prop-tube hole. I poured the resin with the motor, prop-tube and shaft, and outer support all in place to get good alignment, and twisted the prop tube post-pour, to ensure the resin flowed all round for a good seal
I would use a shorter set-time resin in future!

Next, I set about fitting the missing gunwale rubbing and chine strakes. Over 50 years ago, Dad had obviously decided he’d gone far enough and hadn't fitted any.

I steamed the Obechi Gunwale strakes using a plastic tube and wallpaper steamer, then clamped them to a frame mould I’d cut to shape them, which made them easier to glue and pin. I used J Perkins Aliphatic Resin, and the tiny Amati pins and “nailer” – which proved particularly challenging on the beech chine strakes

Overall very pleased with how this is going together. Now to find some paint!

So having stripped out all the old equipment - see image of home made rudder servo! - I decided to check for leaks. I used some soup cans for ballast, and after around 45 mins found some water coming up the old 3/16" x 9" prop shaft.
Having asked advice on the forum, I need a new 5mm prop shaft, but will wait until I have the motor, before ordering one. I may need a different length, and now I know I'm opening the hull, I may as well fit a new metric rudder and tube too 🤔

It must have been in the early '70's when my father and brothers built this model. It had a car blower motor, a home made server to steer (see picture), and my eldest brother built the RC system. We had fun on many boating lakes on holidays in North Wales, and I've decided to refurbish her, and get her on the water again. She was named "Endeavour", as my mother said it took a lot of endeavour to build her! I think I'm going to fit the missing chine and gunwale stringers and repaint her as a Fireboat - of some sorts!
I'd like to go modern with the RC, motor (brushless?) and metal geared servo.
Any advice - particularly on motor sizing would be appreciated. I saw a similar Fireboat on the water at Southport Model Boat Club open day recently, with an 850 motor, which seemed to sail very nicely