it was escicline in the early days before synthol, and later on still in his back, if you notice in 93 his arm defintion is very good as escicline doesn't make the muscle appear smooth,as i believe its water based. Synthol is a much different look,or better still any bodypart that has been injected alot with any type of oil over a period of time, will start to lose its definition as he did around 97, his arms were huge and still shapely but the feathers were gone. Flex was known to put up to 60ampules of Escicline into himself prior to competing and inject all the muscles of his back, no bullshit, lots of guys used heaps of the stuff, Flex is one of the only guys i know used like GH15 says, infact for a long time i thought he was GH15, still could be, As Flex looked great, but he took heaps of gear and still wasnt huge, and GH 15 thinks anyone over 180 has to be on something, which is bullshit, but flex s body was a work of art and chemistry of the highest degree.
It can make it smooth, it causes so much inflammation and PAIN + PAIN. But when your already 4% bf and dieted down, once you start the carb loading process, it actually makes you real hot, and your veins sart to just pop out like no other, but you can't really breathe cause it has effects on the lungs as well since when your shooting it, some can get into the bloodstream, and it just sucks. Some people with just .5 cc can get 2 inches in 30 munutes, most need about 1.5 cc for that effect.