I suppose it all depends on what percentages of methanol to water you're using... I imagine what you'll be using will be so diluted, it probably won't matter.
https://www.eng-tips.com/viewthread.cfm?qid=39643
"Materials to avoid:
METALS
(e.g. powdered aluminum or magnesium) - mixtures can detonate, with more power than military explosives."
https://www.hyperracing.com/pages/tech_department/600cc_engine_tech/fuel_injection_maintenance.aspx
"Methanol alcohol will destroy anodized aluminum fittings and will deteriorate the fuel bladder in the fuel tank. Did you ever see an aluminum fitting that has corroded from the inside out? This is from methanol when combined with oxygen when left sitting on aluminum."
https://afdc.energy.gov/files/pdfs/methfr.pdf
"Since the chemical properties of methanol are different from than those of petroleum fuels, some materials commonly used to store and transport gasoline and or diesel may not be suitable for use with methanol. Several materials compatibility problems, in both the on-board fuel system and the fueling infrastructure, arose in the late '80s and early '90s when vehicles designed to operate on M85 (a fuel consisting of 85% methanol and 15% unleaded gasoline) were first introduced. A common problem was clogging of vehicle fuel filters with the residue from the reaction between methanol and some of the fuel-wetted parts. These problems were attributed to dissolution of aluminum and leaching of plasticizers and fillers (mostly zinc oxide) from dispenser hoses. These problems were resolved by nickel-plating aluminum components or replacing them with parts made of iron and steel alloys and by changing hose liner materials to eliminate the leaching of plasticizers and fillers."
"Acceptable tank materials for containing methanol include carbon steel, fiberglass, and stainless steel. Due to cost, stainless steel tanks are rare. Carbon steel tanks used underground must be protected against corrosion, usually by a fiberglass coating."