I like glass beads blasting method as it removes all the old paint but leaves aluminum surface undamaged.
Here is result of treatment. Crankcases:
I asked guys from blasting workshop to clean cylinder head and cylinder block especially meticulously to clean out space between cooling fins and in all deep points. They did good work.
And as I have intention to polish valve cover and side covers, I asked to treat them less hard.
And final stroke: the whole lot of gaskets and covers I made. Looks quite impressive and that’s without original covers, huge amount of hardware and different special tubes and coverings I used.