It's made of titanium alloy resist the temperature and painted very dark blue, but it felt smooth enough... I would guess that an F-117A would feel different as the surface finish has advanced since then...
Inside Rzeszów's Technical University there is an engine of (I don't remember exactly of what plane, sorry. The 2 I give might be most close, but I'm not sure) A4 Skyhawk or RF-4 Phantom shot down during the Vietnam war. Since Poland was a communistic country back then, the engine travelled (dunno why) to Rzeszów and is still kept here. What's more strange, it's kept inside the University, but not shown to the public. I managed to see it, though
I use to refuel these while stationed at Kadena AB on Okinawa. Sleek from a distance, but they always reminded me of clinker built ship when up close to the overlapping plates of the fuselage. And compared to the F-15's the pilot's cockpit, which I got to sit in once was very late 50's, early 60-ish in layout and instrumentation. All the cool stuff was with the RSO in the second seat, which even with my Top Secret clearance, I was not allowed to see.
Since the seals in the SR's fuel lines were designed to work above 30K feet, we only gave them enough fuel to reach a tanker waiting for them. They leaked fuel everywhere while we fueled them up, drip pans placed all below the fuel lines.
Beautiful to watch take off at night, with blue flame that could be seen for miles as the plane climbed away.
I'll never forget the night that one came back not more then 40 minutes after it had taken off. I was heading for the "Navy ramp" and had to stop to let it go by. Where they got the paper I dont know, but in the pilot's side window he had put up a piece of paper saying "For Sale" and the RSO had in his window, "CHEAP" The next afternoon as I arrived at my duty section, outside the "Habu hanger sat the same plane, an airman on a ladder crouching into the engine exhaust with a shovel and a large pile of black filth and crud being piled below the plane.
I found out later that there had been a problem with the starboard engine and at altitude the engine had crystallized, literally turning to mush. They had managed to return on one engine.
I always found them fascinating, as much for the engines as anything - the turbojet that turns into a ramjet is genius, and as I worked on ramjet powered missiles in the RAF, it really struck a chord...
I was stationed there back in 1981-1982. The US Marines use to rotate their two squadrons of British Harriers to Okinawa for 6 month deployments. Those were the first ones built that the RAF rejected, and so Hawker-Siddeley sold them dirt cheap to the Marines
I was good friends with the crew chief's of those two squadrons and was proud of those planes, being that I am British by Birth, English Father, Scottish Mother, born in Rutherglen Scotland. I had just become an American citizen in 1980 before joining the USAF.
During 1982 while on Okinawa, I had my duty section watching the news every night during the Falklands war, I use to walk about the base in a jacket I had made which had a large Union Jack on the back, with "Falkland Islands" above it, and "Malvinas, my Arse!" below. You would not believe the trouble I had trying to tell the embroiderer I wanted a Union Jack on the jacket, since he only spoke Japanese.
A year later, in 1983, I wound up a part of the US's own island war, serving on Grenada.