when I wet out the piece tobe glassed,I use a hot batch of resin thats thinned out with acetone,this allows for better penatration into the wood,you want to roll out the tank first ,then put on the cloth,and wet that out ,soak it with resin you dont want any dry cloth.the cloth will go from white to clear youll see.pre cut all of the mat that your going to use first.that metal roller there dip it in acetone once in a while when you roll the resin into the cloth.I think one layer of a nitted biaxial cloth with chopped strand mat on one side is all you need.wear kitchen gloves and work clean.have a buddy mix for you and pass the beer.I choose epoxy resin because I have easy access to it,polyester resins are just as good and way cheaper.hope this helps