This is when most rapid changes in prenatal development occur. All the major organs and body structures start developing during this short period. The baby is also extremely vulnerable during this time and miscarriages are the most common during the first 13 weeks if pregnancy, says the March of Dimes.
Determining the Substrate. The first step in painting any metal roof is determining what substrate and existing coatings you are dealing with. This is a huge factor in what coating system youâll want to use and is critical to determining how to prepare the existing surface.
Coatings â Below are descriptions of the available metal coatings used in the metal roofing industry. Kynar 500 and Hylar 5000 â are trade names for polyvinylidene (PVDF) paint finishes that provide very strong longevity and durability including fade and chalk resistance that leads the coatings industry.