On Saturday, April 10, 2021 at 11:09:50 AM UTC-4, wrote:
On Saturday, April 10, 2021 at 8:56:20 AM UTC-5, trader_4 wrote:
I have a 15 year old Weber Genesis Gold gas grill. Overall, it's in very
good shape. The burners, flame spreader bars and stainless steel
grills are in good shape. But the outside parts that are painted black
has weathered. So, I'm going to spray paint it and hopefully it will look
real good again. A similar new one would be $600+, so I think it's
well worthwhile. The hood and front doors below are stainless and
still look good. But I'm considering painting those red or green for
a different look. So, what needs to be painted for sure is the lower
black metal cabinet that doesn't get hot and the black firebox and
edges of the hood that do get hot. And optionally a color for the
hood and doors.

So far I'm headed towards Rustoleum High Heat in flat black for
the firebox and edges of the hood. And Rustoleum Semi Gloss
regular paint for the cabinet. Here is the interesting and weird
part. Looking at reviews at Home Depot, most people are reporting
that the high heat product works, but there are many that have had
problems, ranging from what is supposed to be black looking gray
or the paint not adhering, even though they did extensive and
apparently correct prep. And all those negative reviews get a
response from Rustoleum saying that their high heat paint needs
to be cured at like 400F for an hour for it to work properly. And
every one of those posters points out that it does not say that on
the product instructions on the can. This has been going on for
years, no further explanation from R. It certainly has lowered my
opinion of Rustoleum. Every person that has any problem with the
paint, that's the answer, basically it's your fault, you didn't properly
heat cure it, even though nowhere except in the HD reviews does
R tell you that you need to do that.

I also find it hard to believe that it really
needs to be cured at 400F, because without that on the can, there
would be like 90% failure rate. That's because most people would
think it could be applied anywhere, not just high temp locations and
part of plenty of applications would never get much heat. You would
buy one can of high temp paint and use it on other parts too. On the
other hand, looking at high temp paints from other suppliers, I see
that there are ones that are ceramic based that do require high
temp curing. But those spell it out in the directions.

So, IDK, very confusing. I think I'm OK because the high heat product
will go where there is considerable heat and the rest I'll do with
regular paint. That was kind of driven by the fact that I think a
flat looks OK on the firebox, but I want semi-gloss on the cabinet.
If I decide to paint the stainless hood red or green, I'm looking at
Duplicolor high temp auto paint as that's the only decent colors,
reg, blue or green that I can find in high temp product.

So, any experience or advice ? What do you make of R and the
heat curing, but it's not in the directions?
The idea of heat treating something implies a kiln. Otherwise the
heat treatment would be uneven. Who owns those?

Exactly. You could use your oven if the parts are small enough to fit.
If you look at auto high temp paint, that's what they suggest, if the parts
won't get hot in the application. So like brake calipers, you could put those
in your oven. And then for various parts that you can't put in your oven,
who knows how hot various parts actually get in a car or similar?
Like painting a pipe, one end could be a much different temperature than
another. And so far I haven't seen any supplier give more information,
like what are the downsides to it not curing properly, will it peal off or
will it just be less durable, etc. Less durable is far more acceptable than
if it peels off. Lots of questions, no answers. But Rustoleum is something
else. Any complaint at HD, even that it's gray instead of black, stock answer
is that you didn't heat it to cure it, even though the can doesn't say anything
about needing to heat it.

With the gas grill I'm comfortable that the firebox part will get hot enough though
and the cabinet parts I want to paint with a semi-gloss anyway, so that's not an issue.