Ding Repair - How much fibreglass to remove

[rodr0drod]

Hello all,

Got a ding in my board. I'm keen to repair myself and have a decent kit with everything I believe I need to mend it properly.

My question is how much of the fibreglass do I need to remove? I'm loath to dig away more than necessary.
It's a 2-3cm dia dent where something has knocked it and it's certainly cracked through the glass. I have removed any loose glass flakes but am concerned if I just repair over what is left the crack could spread or there could be some delamination under the dent.

Are my fears unfounded or do I need to cut away the lot?

Thanks for any advice in advance

[waikikikichan]

#1 How are you going to fill the void ?

#2 How many layers of fiberglass do you intend to laminate over the crack ?

[oldmansurfer]

I would remove the dented part. The idea is to remove all of the glass that separated from the foam. If you leave glass that is not adhered to the foam then it may create a delamination that will grow. Maybe you are at that stage where you have little skill with fiberglass and resin so you don't want to do more than necessary. I used to be like that but now I am more worried that I won't do enough to make a solid fix. Perhaps putting more glass over the top of it will stop pressure on the delaminated glass keeping it from growing not sure of that.. There are many ways to fill in the missing foam. I used to save some foam granules from sanding foam to mix with resin and put in the hole, They sell a product to mix with resin Qcell and put in the hole or an easy one is epoxy putty.