Thank you all for your responses...
I should have added that my garage is on a small industrial estate so it's not a garage attached to my house, but nevertheless my neighbour does have responsibilities.
I think after sealing up as many gaps as possible and vacuuming the entire car storage space I will look into an airflow and will continue to ask my neighbour to do his part by getting g proper dust extractors.
Apart from damage to paintwork I am concerned about damage to the engine bay and ....filters and .... it doesn't bear thinking about!
Has anyone had any experience of using an airflow system?
