Robert Indiana is the pop artist famous for the iconic LOVE sculpture. A great example of an extremely successfully typographic sculpture. What I particularly do like about this example is just the interesting use of the letter placement. The Amsterdam and Leeds examples are both horizontally aligned but this has interesting use of letters sitting upon one another and confined into a square. The pieces are created out of polycrome aluminium or originally cor-ten steel an alloy that weathers to a rich, slightly iridescent, purplish-brown patina after years of seasonal changes.
When coating the aluminium/steel I can imagine it is a similar process to that of the Leeds Bid. Which is a powder coating method. On small scale jobs a spray paint is fine… I have seen good examples of this on spray painting bikes that obviously have aluminium/steel frames. But on larger scale the powder coating method is better.
Powder coating examples: