For this kind of dodgy fix , I do it a little different .
With a sharp Stanley knife , cut a inch square hole in middle of effected area .
Sand the square plug a mm smaller each side .
Tape around hole at least six inches wide . The more the better .
Resin has a habit of going everywhere.
Using a large 100 ml syringe , ( EBay ) , and those fat straws with the little spoon on the end . ( slurpee straws ) EBay 100 x $15 inc del .
Squash spoon end a bit with fingers .
The spoon end should slide nicely between the delam .The rounded and curved end surprisingly slides in . The straw crushes flat when poking in hole sideways .Have spare straws ready in case .
Large syringes fit in the straw perfect. If not , tape around nozzle so it does . Do a dry run first making sure straw is tight on syringe and straw easily slides between the delam area.
Push the straw all the way in to the edge of the delam , connect syringe and squirt in some resin.
Repeat half a dozen times going round in a circle . You may have to change to a new straw if it gets to wrinkled..
This way the resin starts at the edge of the void and goes towards the hole in the middle . No air voids .
Use way too much resin and let it come out the hole . Lightly push down If area has bulged . Important on bottom of board , not on the top . Mop up mess .
Put the square plug back in the hole .
Cover in thin plastic sheet and place bag of soil on top.
With the weight on top , some resin will come out of the square hole around the plug .
When resin has gelled , remove bag of soil , remove plastic sheet , remove tape around hole . No mess. No fuss .
Sand plug area , lightly roll on layer resin over sanded plug area , sprinkle with caster sugar .
Done
Its a less ugly fix . You just see a 1 mm line around the plug.
Ps : for this I use Surfset Flex resin . It is very slow curing making little heat and it sets quite soft . Plastic like , not hard and brittle like normal resin .
That stuff really sticks.
