I suppose I should weigh in here, I'm a total convert to silicone fluid, we've been running it in cars for 30+ years now. I've successfully switched our entire classic collection over to it, except the vintage cable brake jobs
Full restorations with new hard lines are straightforward, the retro-fits are a little more complex, you need to flush the hard lines completely. Obviously when I do this all the wheel cylinders and master cylinder are off the car, so just the hard lines remain. I use a length of clear plastic tube over the bubble flares and pump neat Methylated Spirits (Meths - that purple stuff you had in the Bunson burners in the science lab way back at school).
Several successive flushes using a large syringe to pump the meths through the various hard lines works for me. Once done, I use compressed air to dry the lines. Leave open overnight. Then re-install the freshly rebuilt cylinders and couple the whole system back together. I then fill the reservoir with Bel Ray DOT 5 fluid. This is the brand my local motorcycle Speedyquip shop stocks. 1 small bottle will completely fill a Giulietta system and a second bottle facilitates the bleeding process. A vacuum pump does a fantastic job of sucking 90% of the entrapped air up from the MC & surrounding lines. The remainder I pump out via the bleed nipples at the wheels.
On that subject, pump the pedal.... s_l_o_w_l_y --> silicone aerates for nothing and an enthusiastic jockey on the pedal will see you leaving it overnight to let the bubbles dissipate. The first few squirts out the bleeder will probably contain a few purple spots - this is the dye in the purple Meths and will not harm anything. A bit occasionally stays behind when you blow the lines dry. 2 Pumps and its all out. I normally start with the wheel closest to the MC and work out from there.
Sprints, Spiders, the Ti, '68 Nissan Silvia Coupe, Dad's '30 Triumph Super Seven Tourer with original Lockheed hydraulic brakes all run on silicone DOT 5 Bel-Ray brand (imported from the USA)
I'm fastidious when cleaning & assembling brakes, several old ice cream tubs partially filled with meths, wash, rinse 1, rinse 2 & rinse 3 before assembling the wheel or master cylinders. Every part goes through the process, washers, seals the lot. On the subject of sealing washers, I always clean & anneal the copper washers, then clean them again & they also go through the wash rinse repeat process.
My 0.02 Lira's worth anyway