A new pair of Silbury speakers: newbie questions

Hi, I would like to give a similar color to the Silbury I finished (the light brown part, without the scratches). Can anyone suggesting me how to proceed?

Thanks
Roberto

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I have another question: I've placed both speakers close to a wall, far from corners, with a low Zout Class D amp, and Silbury still sound full and without any need of subs, while in comparison FHXL would benefit from a sub on certain genres. Is it normal and would it be balanced with an higher Zout amp? I've not tested them both with a feedback-less tube amp.