I tried turtlewax safe cut to remove some scratches and swirls on my myvi hood before - by hand. This is hood only and myvi hood is small. Wash car + Surface prep + cutting + AIO sealant. Step 2-4 are only on hood. Took me whole morning from 9am to nearly 1pm. Then gave up already coz kinda exhausted haha
To do this by hand, you have to:
1. Damn motivated
2. Enough sleep the night before
3. Great breakfast
4. Averagely 1 day do 30-50 times pumping
5. Water, preferably isotonic drinks.
6. Tools (dont worry too much on tools coz the first five is the most important

)