What is the safest way to take the shine off new zincalume roofing sheets, without doing too much damage to the protective coating. When new it is very shiny and takes along time to dull off much longer than galvanised iron. Is Vinegar OK/enough, or can I use phosphoric acid? Some You tube videos use toilet cleaner that contains weak hydrochloric acid on galvanised roof sheets, but not sure is safe/same on zincalume. any suggestions?
327900cookie-checkreduce shine on zincalume