Welcome to PD's...OMR

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If you Google the Eppleton Hall you will find a number of WEB sites dedicated to this vessel

One site will best display the paddle wheel colour as
red oxide against the black hull
Another displays in B&W, the wheel construction which clearly is of fabricated rims with feathering wooden floats
So form this, a reasonably accurate rendition would be the same
red oxide for the rims & associated feathering gear shafts with dark stained timber colour for the floats

....Derek