So you need
1. Thread (Preferably cotton, as it soaks in lot of glue and grips better)
2. Any glue used for crafts, leather repair, furniture repair will do But NOT superglue! I used craft glue 'Fevicol'
3. Toothpaste (Optional)
Step 1: Apply some glue on the frayed end.
Step 2: Wrap it tightly with thread. (Cotton thread)
Step 3: Tie both ends of thread & leave it to dry.
Step 4: Apply toothpaste & leave it to dry.
Step 5: Make it neat and tidy.
Step 6: Done!
I initially was hesitant to write this instructable as i wanted to test the integrity of this fix, but it's actually quite strong, its been three days now & it hasn't come apart. For a quick fix, I think it's quite durable..plus it's flexible; Ideal for lacing in my opinion.
Let me know what you think.
Oh I forgot, what if you have colored laces? Well I can only suggest. (Since I havn't tried it)
What you could do is, depending on what color the shoe lace is, you can mix color in the toothpaste, or use sketch pens or marker pens after it has dried.