Tape is a good temporary solution, but you'll want to repaint the boot for long-time preservation. Since you're wearing Klingbeils, they're leather uppers, which are easier to clean and repaint.
I really like the Angelus line of products—they're relatively inexpensive and can be picked up at most arts & craft retailers in the States.
1. Remove the laces, and clean the surface of your boot. I use a little bit of dishsoap and water with a cloth, sometimes a toothbrush if there's some scrubbing to be done. Wipe dry once you're finished. Wait about an hour.
2. Once the surface is dry, mask the sole of the boot with painter's tape. Use a leather preparer and deglazer (I use the
Angelus one; I don't recommend acetone preparers on skates) to break down the old paint and glaze. This prevents the paint application from cracking and ensure you are actually painting on the leather, not just on top of old paint. If you have any deep nicks in your boots, this is the point where you will use a
leather filler, then lightly sand so that paint will adhere to it.
3. Grab a good paintbrush, preferably one with softer bristles (
this is a good set), and get to painting. It takes about 15-30 minutes for the paint to dry per layer. I typically do about 2 or 3, and let it dry for 2-3 hours afterwards.
4. Apply an acrylic finisher, which is a clear protective top coat and a good scuff protectant. Angelus offers them in a variety of finishes (I like satin). Let dry for another 2-3 hours. Waterproof with Sno-seal/etc.
As for care after painting, you can always keep the toes/etc taped up with skate tape during practice. A Magic eraser and shoe polish works great for touchups.
