I used the "Aircraft Remover" product, brushed it on with a regular paint brush and then used a metal paint scraper to remove it once it started bubbling. At times I found it would need to be layered on twice, but rarely any more than that. 15-20 minutes sitting there and you can literally watch it bubble up ready for removal.

Afterwards I used an orbital power polisher with 180 grit sand paper to remove the remaining little bits and that cleaned it up to the nice polished look.