Never strip doors by immersing them in baths of caustic soda as this can damage the timber, weaken the joints and cause the doors to warp.
Peidiwch byth â thynnu paent oddi ar ddrysau drwy eu trochi mewn soda costig oherwydd gall hyn ddifrodi'r pren, gwanhau'r uniadau a gwneud i'r drysau anffurfio.