Thank you for your great suggestions, Yes the body color does make those gaps stand out especially with the contrast of the black undercoating. Since I'm waiting for the cavity wax to set up and I have a couple other seams in the inner wheel well areas I figured I would deal with it now in as simple manner as possible.
Steve that's what I have been looking at using. Since some seam sealers come in a brighter white that looks like the ticket.
The huge problem with stainless is, it looks so good I'm afraid I won't know where when stop 🤣🤣 Under hood, under trunk, fire wall , inner splash shields, door sills, gas tank shield ,,,,,
Thanks again