I’ve printed on golfing umbrellas before using the nylon vinyl from Grafityp. I had a right nightmare with them as they were to big and awkward to go on my heatpress, so I ended up using the iron instead!
It was a bit of a learning curve, and I burnt through one brolly, but once I got the temp and timing right, it was fine – and the ironing board was quite a good shape to hold the umbrella too!
The customer didn’t know any different – he was really happy with them, and I’ve had no comebacks!