HC Deb 12 March 1951 vol 485 c107W
4. Mr. Richard Adams

asked the Minister of Supply how far the use of zinc and other protective spraying is permitted in the production of such building materials as rainwater goods and metal windows; and whether any restrictions will be placed upon the use of metals in short supply for such purposes.

Mr. G. R. Strauss

So far as supplies are available, zinc and copper or their alloys may at present be used for protective surface finishing of metal windows and rainwater goods, other than cast iron.