no probs. i guessed it. cos it was too hard to measure it. due to the temperature. the first time i mixed it. i weighed it. and half of it went solic b4 i got to half way. so all the rest of the other time i just used a tiny bit. and left it overnight or in the sun to dry. ;-)
thanks.yeh i like hands on stuff. wish i had more time though.. Fckn hsc -.-'
make sure u wear long clothes when u sand. otherwise u'll be scratching urself whilst sleeping.. haha