While I was in Uk in Noughties I bought two antique pond yachts to restore one day...
The Vintage Model Yacht Group published several booklets printed by Curved Air Press based on articles going back to 1920’s.
Jack’s Guide to Restoration of Older Model Yachts
Your Model Yacht - how to sail it
Tuning up a Model Yacht
These are now available from Sailsetc but their website appears to be down.
Techniques and suppliers have obviously progressed or changed in last 100 years but some advice is as relevant today as then. From restoration manual p1 first line:
“Some important Don’ts
Don’t bring boats, tools, work in progress from workshop into kitchen without an express invitation.”