Hi Brett, I've consulted a clever friend who tells me that it is possible to reverse a single phase AC motor but my eyes quickly glazed over as he went into detail...... I then went to google; try 'The Selection, Connection, Reversing & Repair of Electric motors', Lamperter.
Do you need to reverse because you're cacky-handed?

I had an old friend who was a 'thrower' for Fowler's, making demijohns, and he was taught to throw with the clay coming towards him on the left-hand side of the wheel. His apprenticeship was 7 years!!!!
Matt, If you are interested in ash glazes have a look at 'Ash Glazes' by Phil Rogers. He's a pom, and not only are they excellent cricketers but not bad potters!!
Pat