I can get it done up here for half that, and they 'talk' bikes,mask things off properly etc...so some will lean your way, others won't. keep looking though.
Lacquering. If you can get it done by somebody in the trade(highly recommended) then, yes. It will seal it all in so the bike can withstand muck, dust and lord knows what else and, warm soapy water. All that is repeated many times over the year, so lacquer is worth it, if practicable for you to get it done. Don't do it at home with a rattle can! You need trade quality 2k stuff that hardens. In my experience rattle can DIY lacquer sits on powder rather than adhering, no matter how you prep. I'm just sore from a bad experience though
Although, if your bike won't see much off-road filth and rocky/gritty terrain you may get away with it. Just be sure to apply decals nice and flat and wash gently with a sponge and plain water, or bike specific shampoo.
Ride yorkshire on an old bike.