What is the main purpose of using abrasives on wood?
To remove blemishes and smooth the surface
To shape the wood
To build up a protective layer
What is an emery cloth?
A soft cloth used for polishing plastic
An abrasive cloth used in metal work
A cloth used to put varnish on wood
Why do plastics often not require finishing treatments?
The surfaces of plastics scratch and mark too easily
It is too expensive and time-consuming to finish plastics
Why might some metals be given a plastic dip coating?
To try and make it look like plastic
To disguise that cheaper metals have been used
To protect from rust and weathering
Why should care be taken with some paints and varnishes used to finish wood?
Paints and varnishes can be poisonous if ingested or inhaled
Paints and varnishes can take time to dry properly
Paints and varnishes are expensive and should be used sparingly