Hello,
how to do if we not want to use a “resin tank” for 6 months that had for example white resin? it is advisable not to use alcohol to clean … it will remain resin on the bottom of the tank …? and it will not be possible to use it later …
2nd question: it is possible to change the resin, for example from transparent to white? in a tank?
Generally, you can just clean the tank out with the supplied scraper (gently!), that is also a good point for filtering your resin. Once you cleaned out most of the resin, I think it should be safe to just store your tank.
Switching resins should be possible, especially coming from clear to another standard resin.