MGB & GT Forum

I was wondering if anyone has tried speeding up the curing process of "rattle can" spray paint by putting it in the oven?

If so: How did it turn out? What temp? How long?

I know it would have to be dried to the touch before going in, I just don't know how it would affect the curing process.

-Kevin

Rattle can paint has catalysts/hardners desinged to help the drying process in normal temperatures. Putting this type of paint in an oven above normal outside temperatures (above 120 degrees approximately) will have a negative impact on paint usually bubbling and lifting of the paint. Paint that is made to be curred in an oven has different catalysts/hardners desinged for high temperatures. When I worked for Toyota, we baked the cars at 400 degrees F for about 40 minutes after prime and after top coat

VHT caliper paint 200 degrees for 1 hour per can instructions. Worked great.

Tim

Tim,

you are correct, there are some speciality paints designed for oven cure, brake, exhaust manifold, etc. My assumption was just basic hardware store "rattle can" paint

As other's have stated... Depending what paint type you're talking about.

I bought Rustoleum 500 F paint. Painted my manifold exhaust pipes; then BBQ'd them on a closed grill. There were 3 different temps that they had to "cure" through for 30 minutes. Last was 700F. I reckon that paint ought to hold now...

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The Red Baron
1975 MGB
18V797 w/ Dual SU HIF4
Manual Synchro 4spdLaycock "Blue Label" OD
Distributor: 45D4

I'll have to try that caliper paint out. I've use the VHT Flame-proof Header paint before, but it didn't say anything about baking it. It just said that it takes 7 days to cure.

I decided to go ahead and experiment. I put two things, on a piece of foil, in the oven at 250, for 30 minutes with mixed results. One thing was a piece with Krylon Rust Tough Primer and that turned out great. The other has potential. It was a pulley with Krylon Gloss Black enamel. For the most part it looks great! I can tell a noticeable improvement in the gloss, that thing is SHINING!

I learned two things though.

1) Do one side at a time. Even though it was dry to the touch, the bottom side stuck to the foil and left a make where I pulled it away. I figure if I paint and oven-cure one side at a time this won't happen.

2) Let it cool on the rack in the oven, maybe just pull the rack out. When I pulled it out using an oven-mitt, it was still a little tacky and pulled a small piece of paint away. (The primer didn't do this.) But now that it has cooled off, it seems to be both completely dried and hardened. I'll have to wait and see about the durability.

I guess there is a third also. I could just go buy that VHT Caliper paint that is made to go in the oven. Then I'll know it'll work the way I want it to.

-Kevin

Can I ask what you're trying to gain here?

Is there some need that has to be satisfied? A reason for the baking?

B

Not wanting to wait a week for the paint to cure if I can do it in an hour.

-Kevin

I do it often. 150 degrees for 30 minutes the turn oven off and let cool without touching. Electric oven. Used to keep an oven in my bluing shop just for this purpose. It was gas so you can use either but either one will stink as paint dries. Oh, learned the hard way about the oven vent on a gas oven-started my oven and forgot there was a can of foam in a can on top of the stove. 15 minutes later it exploded, sending the can THROUGH the cheal 5V tin roof and covering my stove with sticky crap that has no known solvent. Just glad I was not working closeby at the time or I'd probably still have the stick crap on me

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Lord, please give me patience because if you give me strength I will have to ask for bail money, too

I've had success with a different approach... After a full cleaning, I have baked a motorcycle part for 30mins at 250 giving it full time to heat all the metal and to reduce as much water vapor as possible... Then took the item out and sprayed it with rattlecan epoxy paint and have had good success in the past.... for your reasons, it did seem to cure a lot fast also... I did use a different can of spray once and it crinkled finished immediately...

Good luck

So you painted it while it was still hot from the oven?

I've tried that and was not happy with the results. Paint would dry before it had a chance to lay down into a smooth coat. Left a dusty finish without much gloss. Success seems to depend on the brand/type of paint. I've used Duplicolor engine paint with ceramic on many, many aluminum packing strips by spraying, dry till no longer tacky then cook as mentioned above. Try to remove parts from the oven hot and the paint will still be soft

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Lord, please give me patience because if you give me strength I will have to ask for bail money, too

Small items ive used a heat lamp.

I am still in awe of how GLOSSY that pulley came out! I don't know how the heat caused it, but I like it! Maybe the heat melted the paint since it had not cured yet, and smoothed it out and brought out the shine in the paint.

I'm going to try a few different parts and few different techniques and see what works best. We'll see how it goes.

120 F is nothing.

About the same temp as out in the sun on a 70 F day.