When you look at the work required to replate a bumper, you can appreciate why it costs a bit of money.
I have dabbled in home based electroplating as a part of a house restoration project. With the help of Caswells who operate on both sides of the border, supplies, equipment, and expertise are readily available.
They have a process called Reproplate that produces chrome like shine and colour without using chromium.
Success in plating depends on a high quality DC power source Around 5 volts but with high current that is adjustable.
One of the challenges for DIY plating is removing the original plating. Rust does a great job, but not reliably, so you have to reverse plate it off onto some other metal.Then the parent metal has to be polished. Like paint, the chrome doesn't cover up imperfections. The usual technique uses a layer of copper over the surface followed by local flash copper plating which allows you to build up any pits that appear. The copper gets polished smooth and then a layer of nickel followed by the chrome - or reproplate.
Its a lot of work! And its usually dirty - perhaps worse that sanding fibreglass on a hot humid day...
So - yes, you can Do it Yourself but - the chemical kit from Caswells required to do a Europa bumper is about $1800 CDN. You would have to build a tank designed for the bumper and get a 25 amp or perhaps larger power supply.
Once you have the set up, you can do several bumpers and by refreshing the chemistry do more.
Lots to think about - and I can tell you the prep work is harder than the plating!!!
Grant in Nova Scotia