the guardian had a very good feature about making DIY paul smith shirts, maison martin margiela shirts and a temperley dress (source - guardian.co.uk)
here are the instructions for the margiela waistcoat.
Maison Martin Margiela says: This is a variation of a piece we did for the Artisanal 2009 collection. "Evaluate your skills and select materials that are easy to work with. Don't compromise your taste or you will look, and feel, like an idiot:
1. Take an old waistcoat or find one in a charity shop.
2. You will need a
craft knife, spray-on adhesive, clear parcel tape, newspapers, a ruler (preferably metal) and a surface to cut on.
3. Lay the newspaper on a flat surface, as if you were about to read it, and cut it into strips around 1.5cm wide.
4. Spray the outside of the waistcoat with the adhesive spray.
5. Stick the strips of paper to the waistcoat at different angles, pressing and folding as you go.
6. Using the tape, cover the whole waistcoat in a single layer of tape, tucking the ends of the paper strips and the tape neatly inside.
7. Tape more strips of newspaper onto the inside of the waistcoat, along the bottom and neckline, so that they hang down outside the waistcoat.