The situation with Viking shields seems to be more complex than VerSacrum suggests, because, quite surprisingly, these items have remained largely understudied. Some shields may have been covered with leather, but others apparently were not, as their wooden surfaces still bear remnants of paint. RP Models might just have it right.
For recent research on Viking shields, see here:
https://www.sciencenorway.no/archae...ending-our-ideas-about-viking-shields/2203358
For recent research on Viking shields, see here:
https://www.sciencenorway.no/archae...ending-our-ideas-about-viking-shields/2203358