I've just given an inside wall two coats of paint. Now that the paint
has dried I've noticed that close up the wall is criss-crossed with
tiny, tiny mosiac like cracks. The wall hadn't been plastered so there
was no chance of movement. However, the time between the first and
second coat was the minimum recommended (2 hours) - could this be the
reason?

Bearing in mind the cracks are tiny (but now that I know they are
there they bug me!) can I just give the wall a third coat? Or do I
have to sand it off and start again?

Peter