COSHH essentials produces generic advice. The legal requirement is that the risk assessment must be suitable and sufficient, so check that the downloaded sheets fully describe the task you do. If so, follow the advice in the sheets. Otherwise, think about how else you could use the advice to avoid workers health being harmed. You should take into account any information you have on levels of exposure, such as the results of monitoring, or health checks.
For further information see the [HSE publication A step by step guide to COSHH assessment](http://www.hse.gov.uk/pubns/books/hsg97.htm).