Good point re' paper finishes. I could not make any sense of the original post as, like others, I could not see how the paper would give visible grain so refrained from comment but now you mention it, Ilford's Satin and Pearl RC papers have a mechanical texture to them that may be the source of this "grain".
BG, can you look at the label on the paper pack and tell us if it says "Satin", "Pearl, "Glossy" etc and whether it is RC or fibre?
P.S. Hope the house purchase went/goes through OK - can be a real pain!