11-11-2020, 02:17 PM
Epoxy is the way to go. The trouble with polyester resin is that it only sticks to itself and won't stick to the aluminium. Epoxy sticks to anything, is available from many chandlers & ebay and is available in smallish quantities.
https://www.ebay.co.uk/itm/Epoxy-Resin-R...SwEMddK5ph
https://www.ebay.co.uk/itm/Epoxy-Resin-R...SwEMddK5ph