Credit knocker - as Daniel stated. The chimes unit has been moved back - that's why you have three holes in addition to the three holes that the knocker is installed.
Thankfully, you have chimes. These are sometimes missing and difficult to source.
Nail removal - Check out my Aces High resto.
White paint - Gavin might know this. For the last Wedgehead I repainted I took a sample to "Paint Mobile" in Preston and they did a match for me. I don't have that paint any longer to give you the formula - Sorry ! Just make sure the paint is not a full gloss. Semi gloss or stain is fine. Again, Gavin should be able to help out.
