I have a full size replica hood.  Ive had it for years and bought it from a guy that said he won it as part of a Food City race package. Its autographed by Dale Jr., or its suppossed to be his autograph. It has a couple stickers on the back and one says its from Grimm Industries and stamped March 1999. Grimm is a real promotional company. How can I find out if Jr, really signed this?