A chemical reaction that appears interesting calls for washing of the product with methanol then allowing the product to dry, can this be substituted for ethanol or IPA?
Probably, depends on what you're washing off and the nature of the product. Without more information about the procedure it's not really possible to to say with confidence.
For example, if your product contains a methyl ester and is contaminated with strong acid or base, choosing ethanol to wash the product may result in some transesterifiaction to give traces of the corresponding ethyl ester - in this case it might be necessary to use methanol for reasons other than volatility.
It is also possible that your product will be too soluble (or the impurities too insoluble) in IPA to make it an effective washing solvent, this depends on the structure. Methanol and ethanol are about the same in terms of polarity, but IPA has significantly lower dielectric constant.
Try it and see....