I give completely contradictory advice to Andy and recommend 139 or 145 solder with liquid flux Carrs Red label is a bit less corrosive and easier on the sinuses and soldering iron tip than yellow label.
I would agree with Andys comments around cleanliness and the size of soldering Iron I found the Antex best with a long tip life 25 Watt suitable for most work, though I have a 55 Watt temperature control iron for brass and whitemetal work.
I find 145 gives better results than 188 for general work in loco and coach building. 188 is more free flowing and best for sheet metal work forming neat joints between accurately fitted components.
Dilute phosphoric acid is a more economic alternative to the Carrs fluxes. I use Ranex Rustbuster basically a phosphoric acid solution available in 250ml containers from the local hardware, not sure if there is an Irish equivalent. I dilute the Rustbuster 50% before use which goes a long way.
There are also citrus based fluxes available from DCC Concepts in Australia which is slightly less hazardous but expensive or rainwater readily available and hopefully even less hazardous
That's a beauty, Brassnut. The livery is a unique one only carried by this locomotive and no other. She is one of a class built by the MGWR (who ordered the first of two batches of them) and the GSR and introduced into traffic between 1925 and 1930. Mostly withdrawn in the 1950s, a couple lasted in use into the very early 1960s.
They were colloquially known as "Woolwichs" because they were built from kits of parts brought in from the SECR in England. Officially they were K1a class (NOT "N" class as sometimes misquoted; these were the narrower-gauged similar locos in Britain!).
They were to be seen on the Dublin - Galway, Dublin - Cork, and Cork - Mallow - Waterford - Rosslare routes in particular. They were too big for branch lines and never went north.
That one you have, 388, was painted thus for a few short years in the late 1950s specially for the Cork - Rosslare line, in particular the "Rosslare Express". It left Cork in the early morning, and returned from Rosslare in the late afternoon.
All of the class entered traffic initially in all over grey, and several of the 26 (?) were never painted any other way. Most became lined green from 1945 onwards, though at least one, I believe, was painted plain black in the late fifties too.
In this form, therefore, its historically correct surrounding would be late 1950s CIE, with a mix of old GSWR wooden coaches, possibly a then-brand-new Park Royal or laminate, and the odd Bredin or 1951-3 era CIE coach....
Happy Xmas to one and all. I got a gift from a friend of a locomotive he got in a charity shop in fermoy. Lovely condition not a mark or scratch.on it it's a real flyer on the track very powerful. However I don't have a clue about it othere than it's a Bachmann can any of years folks come to my help with some information thanks brassnut