1. Find an aluminium component with scruffy paint, which you believe would look quite nice in bare polished metal. Ensure there are plenty of nooks, crannies and compound curves on said component. A brake lever assembly is ideal.
2. Attach some low-grade sandpaper to the small drum attachment of your Dremel.
3. Remove all the paint very gently, so as not to completely destroy the metallic surface.
4. Inhale plenty of paint and metal dust - it's good for you.
5. Realise that aluminium does not respond particularly well to machine sanding, and your valiant efforts to not completely destroy the surface have been wasted.
6. Find some high-grade paper and steel wool, and spend the next 1-2 hours scrubbing away frantically by hand until all the ripples, gouges and deformities have been removed from the component.
7. Spend a further 5-10 minutes scrubbing away frantically at your hands/arms/face until all the black residue has been removed.
8. After allowing your wife to enter the room, spend another half an hour washing down all surrounding surfaces and scrubbing the carpet.
Congratulations. Not only have you shaved several grams of metal from your chosen component, you have burned several thousand calories in the process. nB: Do NOT show said component off proudly to anyone else, in search of praise or compliments. There is a good chance they will immediately spot a fragment of paint that you have failed to remove, and you will feel like a right twat.
...pretend here is reality, and not some expectant itch of july...