por-15 on frame

[bentfoxmx94]

hey all this is my first post on here. i have a 72 shortbed that i bought for my first truck last year. i love these trucks and it was a dream come true when i bought mine.

i just have a few questions about por-15 on my frame. i have my bed off and currently sanding the frame down and i was wondering if there was a quick and easy way to lift the cab off the frame just a few inches to sand and paint up front?

also i was told a quart of por-15 is enough for my frame. is this true? has anyone on here done it?

thanks for your help wil probably be on asking more questions