If it rinses off my hands it'll rinse out of my hair. Not necessarily in 5 minutes but it will and with a mild cleansing agent it should not be a problem. You can also clarify occasionally if concerned.
2a medium porous, You can see my wavy tutorials here: https://www.youtube.com/playlist?lis...ZNxhBHSXAW40OQ and my wavy blog is The Wavy Nation http://wavynation.wordpress.com