RE:Minor Keel Repair
Not my are of expertise but you might be looking at a combination of these options to really set it up right. Methinks that the resin/epoxy as a base with the kevlar keel-liner would make the most durable fix. The important thing is to get it sealed up. From what I know, voids in th gel-coat allow moisture to spread under the gel and eventually cause problems over a wide area....
For all of our sakes, could you post what you finally decide is best?