I see toe guards as being very important, the way I see it why would companies spend a large amount of money on applying them if they are not important. I apply them to all my bats and the ones I make as they keep out the moisture from the ground, Yorker damage and tapping at the crease.
Here is a step by step tutorial on how to apply a toe guard:
Things you will need :
1) Toe Guard or a toe guard set
2) A Standing Knife (Needs to be very sharp other wise it will not work)
3) Sand Paper / Sander (Fine sand paper is the best thing)
4) Glue (Gorilla Glue, Glue from the toe guard set, shoo glue)
First thing that you will need to do is to sand the toe guard slightly along with the bottom of the toe guard then you will need to apply a small amount to the apposing sides and leave for 10 - 15 minutes.
Then you will need to apply a second layer and then stick together and press them together and tape them down to a rough shape of the toe of the bat then when it is secured allow for the toe guard to stick which can take up to 6-7 hours my advice is to leave it over night.
When the two parts have stuck together remove the tape and make sure it is tightly stuck on, then take the knife and proceed in cutting out the rough shape (try not to cut to close to the bat).
Now you have cut off the excess you can use your sander to round of the edges to get it to the perfect shape of the toe. This will only take a few minutes if you are using a sander but if you are using sand paper then it may take longer.
James