Congratulations, I'm sure you'll enjoy your nightmare (Nightmare by SIG). Clean, lubricate and shoot it. Some 1911's like to run a "wet" slide. Start on the wet side, wipe it down if it's too much.
After 70+ years of ignoring 1911's, I re-discovered them about three years ago, when a bought a SA RO in 9mm. When I decided I needed one in .45 ACP, I bought a SIG 1911 Target, followed the next day by a SIG 1911 MAXX. By then, I'd already picked up a DW Guardian and a STI Target Master, so I had a good feel for the 1911 platform. I felt comfortable with buying SIG because of good experience with their German made guns. The SIG 1911's never disappointed me. I recently sold them because my arthritic hands were getting beaten badly.
Shortly after purchasing the SIG 1911's, I purchased several H&K pistols in .45 ACP. Really enjoyed the H&K's but I was always able to shoot the SIG's better. Probably the softest shooting .45 ACP pistol, I ever fired, was the H&K Mark 23, followed by the SIG 1911's.
I've owned a bunch of SIG's, including a great p210 and three X-Series guns. I expected good triggers in the SIG 1911's; and, they were great without any work done to them. Lots of folks are critical of US made SIG's. I've always thought their Swiss made guns were superlative, with the German made ones a really close second. My US made SIG's (five) are almost as good as the German made ones. Certainly as good, performance wise; almost as good looking machined finish.