Our 20 year old Masonite lap siding (on second story only) and soffit must be well cleaned before re-painting. A number of years ago I unwisely allowed vines to grow up the siding and along the soffit. Upon clearing off the vines many of their "grabbers" remained stuck. We were told by a siding salesman excess high pressure washing, scraping and or wire brushing to remove the remanents of the vines may deface/destroy the old Masonite lap siding. We are hoping a professional painter may provide alternative cleaning methods. Also, if this old Masonite facing is so fragile will high quality re-painting (SW Superpaint) and chauliking ensure the sidings future very long term life. (I hope this post is in the correct forum) Thank you in advance for your advice.