Thread: Cracked Brush - What's that about!

Thanks Walleyeman, now that is a reply! Being a Mechanical Engineer it's the kind of thing that interests me. That the brush was old and crap is a bit of a gimme, but as to why plastics fail like they have here I find intriguing. The UV clause is particularly relevant down this end of the world too, good old ozone hole lets so much through that burn time in summer is about 15 minutes! Incredibly hard on rubber seals, car paint jobs and plastics etc. Coupled with residual stresses from the moulding process sounds like a likely cause to me. Thanks for the insights and keep in touch.
Simon