Never had the chance to try VpCI but PBlaster gave me religion. Exhaust
manifold bolts, untouched for 20 years. Spray & repeat...four x because I wasn't in a rush...and they just unscrewed like new metal. U-bolts holding up an external antenna
support, generic zinced bolts rusting for 20-30 years on a roof? One shot, fifteen second count, spun off like new clean metal.
Once it gets that good, can anything really get better??
The only thing I like more is using a CO2 bottle to ice things down, but that's WAY noisier and WAY more expensive.