It probably is just the long-drying thing, but your ';2-part self-hardening clay'; could be an epoxy putty or an imitation epoxy putty, in which case it *could* be a material which could be eaten into by petroleum-solvent based paints (';enamels,'; etc.) and finishes after curing, leaving it sticky.
This does happen with *polymer* clay which is a type of plastic, so we can't use those kinds of paints or finishes on baked clay (unless perhaps there's an acrylic underneath for some reason). Also, with polymer clay the stickiness might show up immediately or not for 6 months or more (sometimes heating it in a low temp over for 10-15 min. will help, sometimes not).
Again, I don't know if this would be true with the clay you have, but thought I'd mention it just in case. You might want to check with the instructions for you clay, or do a web search for it online, to find out which paints are recommended for it, how long after curing, etc., and which may not be recommended.
Diane B.Why is the enamel paint I'm using still sticky after 24 hours?
it usually take 3 to 4 days for most enamel paint to dry to touch more in humid situation , if the item is small enough you can put it in your oven and turn on the light only with the exhaust fan going should dry in about 12 hour it make your oven act like a dehydrator and yes it dose work there are also camper chemicals you can set close by that will aid in the drying
Maybe you have too much humidity (too much moisture can retard the drying process)in the area where the paint is drying or not enough ventilation. Get your hairdryer, put on cool setting and about 2 feet away blow dry it for a few minutes to help speed up the drying process or put a fan on and aim it towards your item. Whatever you do, do not use heat, room/cool air tempurature is better for the paints curing time. that should do the trick. if not, then its the paint. (did you stir thoroughly before applying-if not and all the chemicals in the paint have not binded so that would slow the drying and of couse become a weaker product. (paints usually have a long shelf life, but it its been opened, it will oxidize and leave a film - to prevent that, use cellophane and put it directly ontop of the paint and that would prevent air getting to it and paint will last for years, seal lid)
Hope this helps you...good luck with your project.
its most likely oil based which is a real pain in the ***, i did my door frames with a crappy emamel oil based paint and it took almost 2 days to dry, it was so sticky
Enamel takes FOREVER to dry and their 6-hr guideline doesn't mean it's totally dry before you apply the second coat. It just means you can APPLY it then.
The Muse
Paint can expire. I have had this happen with my craft paints. I ended up throwing them all out. I came across this on the Internet that might help you.
';Add a bit of solvent to the first layer. Spirits of turpentine and oil of spike interact chemically with the paint, causing it to take up oxygen more rapidly and dry faster. Mineral spirits do not react in any significant way, but all solvents will make the paint layer thinner, which does make paint dry faster. Don鈥檛 add so much solvent to paint that it becomes washy or watery. Just add a little bit.';
http://rourkevisualart.com/wordpress/200鈥?/a>
High humidity will also slow paint from drying. Never paint on a rainy day. Keep a fan on circulating the air in the room. Primers are made for different surfaces. Your local hardware store carries pretty much any kind you would need. Primers are basically used to create a surface which makes the paint stick to it and lessen the chance of the paint peeling off in the future. Considering your painting clay it probably isn't possible to start over. Try the turpentine to thin out the first layer and purchase fresh paint to finish the job. Good luck :)
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