Stepping up the ladder of supports is MDF. This material can cause a health hazard
so a mask must be used to prevent inhalation o the dust. As in the previous brushtip,
the same primer is applied in the same way - only this time, sand between coats to
achieve a smooth surface. This is a lovely support to paint on. If you find it is
too absorbent, more glue can be added but take care it does not divide – stir frequently.
