Sand Paper for me is laborious...I have been restoring a Moulton F from 1965 where the paint is hard and it is just not a possibility. I use Oven Cleaner, foam it on then wrap it in clingwrap...On the Moulton you still have to go over it with a blade, but on other bikes it has acted as dedicated paint stripper would (the one I am using is Selleys Oven Cleaner, with only a small percentage of Lye as high percentage anything is difficult to get in oz.) Is it because you are envionmentally concious you won't use chemicals ? I must admit, inhaling the Oven Cleaner in an unventilated area isn't nice (you almost choke) but you only make the mistake once!!