[Andrewausfa]

We used to use this trick for model making years ago, for example where you'd need a perfect seam where two aircraft fuselage halves join together. I've used it more recently myself in Bakelite cabinet repair.

Sometimes when you get a break in Bakelite it's a clean break but with a little flaking. This method is pretty good for filling those little flakes up. The mixture polishes up well though there will undoubtedly be little pinholes. These can be filled up with an Acrylic varnish - we used to use an acrylic liquid floor polish product from Johnsons - and buffed back again.

Though this was back in the early 2000's I should add that occasionally some guys mentioned the bare joint would absorb water, I assume via the baking powder, over time and weep a little.

Andrew