Denatured works well, recomended solvent for clean up for the bin, though expensive and alot required to really get the entire pump clean. Amonia works equally as well without nearly the cost off denatured. mineral spirits as final flush and store like stated by wolfgang.
If you do a quick flush with alcohol, you should use less than a gallon figuring 50' hose. Then go ahead with the ammonia and let that set in the pump and lines for awhile.
For the cost of a 50' hose, I'd suggest keeping one hose entirely set aside for doing shellac based sealers. I do that with those and any oil-based sealers have there own hose set-up also. In the long run it is a money saver for an initial investment of around $100 or so.
Also, when you do your final flush, take the manifold filter out after, and let it soak in the appropriate cleaner.
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