hi guys,as part of my last order i got a bag of Colloidal Silica as ive seen it mentioned lots of times before.boy is that stuff light!! i got a huge bag and it felt like the bag was empty lol 
question is,how can i use this stuff to help me? im hoping it will thicken up my poly gelcoat a little but im not sure on what kind of finish i will get? can you actually use it on a carbon produce,ie is it clear? or is it mostly gonna be of use for mold making???
many thanks
