Domit, All,
First off, although I felt Domit's comment had a bit of a negative tone to it.......I got that he was making a general reference that hand fabbing a tank with foam and fiberglass was something that anyone could do......in his "neck of the woods" (area),.....that phrase may be commonly used in that context.....chalk it up to regional differences in use of language.
Second, I'm a guy that owned a European car restoration business in Dallas for many years,..and I would have no clue on how to do this..........I can do anything (except for welding---I suck at welding big time) if I see someone do it..............so, like others, I would like to see a tutorial on this topic.
Seems to me that there is a member on this forum that built a beautiful gray colored bike with a Honda 50cc on it. I think he had some killer fake leaf springs on it as well. If I recall, his tank was a fiberglass cover he hand made molded to one of the typical top tube tanks that come in a kit.
Thinking there may have been some discussion somewhere on how he fabbed that tank cover.......it looked great (the whole bike was spectacular)
Brian in Austin