So... I used sellotape. I stuck each piece to my fingertip, over my nail completely and drew around my nail with a Sharpie.
Then I peeled off the tape and stuck it straight on to the lace so I could cut out the right shape. Then you have to carefully peel apart the lace and the tape which requires some patience but the lace came away pretty undamaged.
I used a dark, reddy brown, base for my white lace. I let that dry. Then, one nail at a time, plaster on top coat and quickly put on the lace and pat it down with tweezers or nail clippers. Once it is a bit more tacky, you can use your fingers to press it down.
I put a top coat on my pinky finger but it darkened the lace so left it off the rest (as you can see in the picture)
Considering this was my first time, I'm quite pleased with the results. I think next time I would prefer a dark lace and light shade of polish.
Base Colour: L'Oreal LaquiResist 838 - Really old, bought it from the local market
Top Coat: NYC High Shine Top Coat
Lace: £1.35/metre from Hobbycraft (: