I'm trying to find more information on this artist. Would someone know more about this particular painting? It is signed.
I'm not sure about whether this Robert Dunlap has been found as the 'bio' by that name does not mention anything about abstract art /acrylic art (or I missed it) and does not mention residing in Battle Ground, IN.
There are several similar paintings listed for sale by artist Robert W. Dunlap but I could not find any bio information on this artist but he does acrylic artwork.
I did not see a similar signature but yours may be an older piece and was signed differently.
You might try contacting someone on these sites and ask about your picture.
Just as a long shot - did you try sending a letter to the PO Box listed on the painting?