The original rock that has undergone metamorphism is called the protolith. Protolith can be any type of rock and sometimes the changes in texture and mineralogy are so dramatic that is difficult to distinguish what the protolith was. Note that diagenesis and weathering are also a changes in form that occur in rocks.
This will prevent you from breathing in fiberglass fibers. Refrain from scratching your fiberglass itch. Scratching or rubbing will force the fiberglass deeper into your skin, rather than getting it out. Take a cold shower immediately after working with fiberglass.The cold water will help keep your pores closed so that the fibers don't get deeper into your skin.It will also wash off the larger pieces of fiberglass. Take a hot shower or bath following your cold shower. The warm water will open your pores, allowing any remaining fiberglass to work its way out.he cold water will help keep your pores closed so that the fibers don't get deeper into your skin. It will also wash off the larger pieces of fiberglass. Take a hot shower or bath following your cold shower. The warm water will open your pores, allowing any remaining fiberglass to work its way out.
Process: As you already know, it is going to take a lot to get this down to a mirror glass like smoothness and shine. The 1st step, and literally every other step from now on is sanding. Start sanding your fiberglass with some low grit 36 or 80 grit sandpaper.Always use a palm sander, or a sanding block, only use sandpaper in your hand when you can use a block. Your fingertips will unevenly supply pressure causing streaking. Sand the whole area until you get a less rough more even area to work with.nce you have a fairly spot free and smooth area, use your spot putty on the little pits and valleys. It is a really good idea to use your finger or a razor blade to go over and smooth those out. Sand again with a very high grit sand paper (400-800).