13.14.3. Care of an internal covering
To keep clean panels of an internal covering, it is enough to wipe of them with a damp rag. If on them nevertheless there were spots (that is more noticeable on light panels), carefully jam them a soft brush for nails with use of liquid detergent. Do not forget in the same ways to maintain purity of a ceiling upholstery. After cleaning it is recommended to put the high-quality protectant for rubber and vinyl to prevent oxidation and emergence of cracks. The same means can also be applied and on sealing strips, vacuum tubes and rubber hoses which often suffer from chemical decomposition, and also on tires.