I agree the plumbing looks sketchy i wouldn't invest a lot of money of decorative treatments if the pipes burst down the road. I would also look into your water quality it looks like you have a lot of rust stains that indicates high iron in your water which can really be hard on your plumbing and appliances. CLR is a product to improve the appearance but i would also look into Water softer as well. Stay away from natural products if your water is high iron they will stain fastest. Congratulations on the baby.

ABOVE IMAGE (STRIPS) IS OF FLUTE PANELS (CHARCOAL PANELS, AS THEY ARE CALLED) DURABLE & ECONOMICAL,AVAILABLE IN WIDE RANGE OF SHADES & TEXTURE. THEY COME IN SIZES F 4.5" WIDE X 8 FEET LONG ALTERNATIVELY CHARCOAL SHEET OF 8 X 2,8 X 4 SIZE CAN BE USED WALLPAPER IS AN EVERGREEN OPTION ,BUT IS FLAT IN NATURE THANKS DO CONTACT US AT INFO@SPCONTRACTORS.IN FOR FURTHER ADVICE THANKS

Hi, your requirement needs to be elaborated further with existing photos for providing the best inputs.

Not clear from the pic. Guess some sort of insects colony.