Hi Lizard
Have a look at the pinned post by Muv for safely cleaning and lubricating your machine. Without pics and information about the machine and model, it's always hard to give specific advice. If you know what machine it is then try using the search feature to see if people have already posted the relevant information. You can safely give the machine a wipe down with a soft damp cloth, being careful not to get fabric caught on any flaking bits of paint. Then in terms of cleaning, the safest agent to use is high quality sewing machine oil (this should be clear).
In terms of the carvings, I've never tried to replace them before. If it's a Singer cabinet, people do sell the individual drawers online so it might be easier just to replace the whole drawer. Not aware of anyone who produces replacement mouldings but I could be wrong.
Have fun and best wishes with your project. I hope you'll share some pics!
