Another resource is White Ensign Models, manufacture of the "Colourcoat" line of enamel paints. They have the following guide for famous ships, which lists colors and the appropriate colourcoat-brand paint, but this may help in finding an equivalent:
https://www.whiteensignmodels.com/page/Camouflage+Schemes+Colours/20/
HMS DREADNOUGHT
1906-12 and WW1: Overall #2 Grey (Colourcoats GW 02)
1913: Overall #3 Grey (Colourcoats GW 03)
Wood decks: natural teck (Colourcoats C 01)
Steel decks: #4 Grey (Colourcoats GW 04)
Underwater hull: RN Antifouling Red (Colourcoats RN 19
Anchor cables: white (Colourcoats C 03)
No apparent boot-topping.