WVO in Meth tank

[dero]

I am filling my processor with WVO for the first time & want an accurate measurement to mark on the tank .
An easy way would be to use the meth oxide mixing tank which is calibrated , any problem having WVO residue in this tank for the first mix ?

[fattima]

I would just give it a clean out afterwards, a bit of petrol or similar should wash most residue out.

[dero]

That was my thinking . Thanks .