The "lazy way" is get someone to shotblast it, but the reason I like thinners is that it's progressive and controllable. Think of it as chemical archaeology for bikes. If you take it steady and the paint does shift, you might be able to uncover original decals etc without totally obliterating them, which can be useful for dating & identification.
Handle Xylene with respect and treat it like you would handle petrol in a domestic setting. It's very volatile and the fumes can make you high as a kite in an enclosed space if you use it for a prolonged period. Avoid spillage and keep away from accidental ignition sources such as heaters with high surface temperatures or naked flames. It's extremely flammable.