Amazing as it seems (to me at least) this project is now a couple of years old. It's listed (along with lots of other tutorials) in the Makerie (seriously - you should go and have a look).
Overuse of brackets (or parentheses if you prefer. Oh. Bugger...) aside, I thought it was worth a quick revisit, partly in case you haven't seen it before, but also because we're heading fast into t-shirt weather, and you might have a few which could do with a little restyling. Although the one I used has long sleeves, it'll obviously work just as well with short sleeves or vest tops. You could even try something similar on a bag or cushion if that's more your thing.
So, here you go - one quick and easy t-shirt restyle, revisted:
A plain t-shirt
Needle and embroidery thread
Black Staz-On on Fabrico inkpad
Banana Frog Concentric stamps
Fusible webbing (e.g. BondaWeb, Wonder Under or Heat'n'Bond)
:: Iron your fabric scraps so they're flat and wrinkle-free. Ink up one of the stamps and press down firmly onto the fabric (place a piece of paper underneath if you need to protect your work surface from any ink that might bleed through). Stamp each of the six stamps on to a separate piece of fabric.
:: Iron a piece of BondaWeb (fusible webbing) to the back of each stamped fabric scrap.
:: Cut out the stamped images, leaving a small border around the edge of each one. Don't worry about being too neat – a frayed, imperfect look is fine.
:: Position the stamped fabric circles on the front of your t-shirt. When you're happy with how they look, lift off one at a time and peel away the paper backing from your BondaWeb. Replace the circles, and iron into place on the t-shirt.
:: Cut a square of fusible (iron-on) interfacing to fit behind your pattern of circles and iron to the inside front of your t-shirt.
:: Now you're ready to start adding some embroidery, following the lines and details of the stamps. I used three strands of black embroidery thread for most of them, and worked in plain running stitches with French knots for the dotted circles.
:: When you've finished stitching, iron once more and your shirt is ready to wear.