Should be ok. I nearly took the p!$$ when you said you'd used chassis paint on a very high temp object. But I don't like to shoot my mouth off so I checked on the por15 site:
Temperature Resistance
POR-15 is temperature resistant up to 700 degrees. A test showed that no adhesion was lost at 700 degrees F for 10 hours
3 years ago i rebuilt the the front calipers on my Rover P5b, the pistons did not look good, a mechanic friend of mine said try just rebuilding with new seals and see what happens, nothing to loose.
Well they have'nt leaked and they work perfect, it might be worth a try!!
1979 Triumph Dolomite Sprint Highly Modified
2006 Triumph Sprint St 1050
2012 BMW 318d Touring
The secondary school I went to is about 100 yard from the house I bought. All through my school days I really enjoyed metalwork and used to go in evenings quite often as there were evening classes run. So what do the county cuntcil do? Close it of course. Most of the building is still there and it calls itself a adult education centre but from what I've seen all you can do there now is football, flower arranging and English as a foreign language
As I've said before, if anyone does need any machining work or specialist welding ( Ali, Stainless, Cast iron etc) i'll gladly oblige for a few beer tokens.
Anything to help help the cause along.
Kev ; you and mart are welcome anytime with your buffers.