Take your stencil and trace it onto the felt.
Next, cut the felt out and then stick it on the clear styrene sheet. If you weren't able to find adhesive felt, a little bit of glue will do the trick just fine.
Start dabbing on the paint to the felt, wiping away any paint that gets on the sheet.
Then with a little flip-a-roo action, place your newly made stamp onto your linen and give it a good balanced press. Continue to stamp in whatever pattern your creative mind desires.
Check it out! A tea towel is born.