Hello, all.

Anyone know if it's possible to coat a regular flashbulb to turn it into an infrared bulb?

If so, what kind of coating would do the job?

I have some IR bulbs, size 22. One of them has a cracked an lifting coating, revealing the ordinary 22 bulb underneath. It looks as if it would be the simplest thing to just dip an ordinary bulb in whatever coating is needed....