Fuselage tank slushing (spelling?)

Larry,

Thanks for your feedback. Just to clarify Safe Skies did not rebuild my fuselage tank. They did the wing tanks and they are perfect, no sloshing. I am just not sure if the fuselage tank was sloshed, It is not leaking, does seem like it was never touched since original. How do you tell? since it was empty for a few years, could the brown tint in the fuel be from rust? that is where I am lost.

Correction. Safe Skies Aviation.

I acquired a 1946 415C a few months ago and have been working on getting it back to flying conditions. One of the major problems was leaking wing fuel tanks. Thanks to the group got a great referral and had the tanks rebuilt. Safe Skied did an excellent job if you ever need your repair. As I am getting closer my A&P and I put fuel on the fuselage tank to test the fuel system after rebuilding carburator, replace and clean filter, screens and hoses. We put about 3 gal of 100LL on the fuselage tank and check for leaks, all good. After a couple of weeks we noticed the fuel on the glass gasolator had a brown tint to it not blue as earlier. We think the fuselage tank might have been slushed (not sure spelling) at some point. When I first got the airplane there was no gas on the fuselage tank and the fuel left on the gasolator was blue. At this point the fuel tank and the fuel system still show no leaks for now over a month. My questions and concerns, will this color indicates the slushing is braking down, if there was any done at all. Will this damage the fuel system, engine, cause engine to stop. Any guidance or suggestions will be appreciate it. I would hate to remove the tank because the instrument panel was updated and it will be a major job to be removed. If it has be done then be it.