If gong for a repair then i wouldn't go specially buying/using epoxy steel here unless any puncture its tiny. I'd be more likely to use an epoxy putty like milliput. But simpler still would be a couple of pieces of cloth (old t-shirt) placed on some old poly bag while one scrapes slow setting epoxy into the fibres with an old credit card, another layer around the hole and just stick the bandage on - unless you happen to have a proper glass fibre car repair kit handy it'd work fine.