My own hand is a very effective method of punishing a naughty bottom, especially with the naughty offender drapped over my knee and held securely in place with my hand round his waist. I sometimes cross my legs for a higher OTK spanking.
Delivering handspank after handspank, going slow at first and then building up to a rapid succession of constant hand spanking will definitely make a bottom very red and is a great way to warm up for more viscious implements.
My handspanking has gotten harder and harder over time so be warned!
See some of the bottoms I have hand spanked on my Bottombook.