Todays question is about balsa covering.....
I am trying to provide a resource to revive the old balsa KK EeZeBILT range for young kids (see the links section if you want o visit the site!)
KK EeZeBilts were made of balsa, which is a brilliant material for cutting and sticking, but a poor one for resisting handling and water. So, once one was built, we used to cover it in sanding sealer to protect it, inside and out. Sanding sealer is still available, but hard to find and, I suspect, expensive. Is there a more modern varnish or filler which will do the same job and can be bought at B&Q?
I had thought of the polyurethane range, but I understand that they can form a skin over the wood, then split and let water in? What I need is a 'filler' which really soaks into the balsa....