This product is designed to used as a topcoat over other Rust-Oleum products.

We would recommend testing on a small area prior to full application if you wish to use this over faux gold leaf.

If the paint is still wet it can be cleaned up with Xylene or mineral spirits.

Once it has dried it would need to be abraded.

No, unfortunately we do not have a product to recommend for this application.

No, this product has not been tested to be food safe.

No, unfortunately we do not have a product for this application.

With this type of product and application we would always suggest a trial which you have already carried out. A trial will always provide a better insight as to whether the product will be suitable for a particular use than theoretical technical data. So, if it has provided the finish and performance you require, we could see no reason you couldn't use it.

Yes it can be used for this type of application as long as the paint is well cured. If the paint is not fully hardened the Crystal Clear may react and cause it to wrinkle. You can do a test first, build up a few light coats rather than 1 heavy coat as this is also more likely to cause a reaction with the paint.

Rust-Oleum Crystal Clear has some strong solvents in which could attack some types of paint coatings, so we would recommend a test area first to ensure suitability.

Rust-Oleum Crystal Clear has very strong solvents in as do most aerosols and the product is quite likely to attack a freshly applied paint coating. If the paint has been on the tiles for a month or so it might be OK but we can’t guarantee it. A test area would be advisable.

Provided the tiles are not in a shower enclosure, another option would be Blackfriar Quick Drying Varnish, this would be less likely to react and will be easier to work with.

Rust-Oleum Crystal Clear is based on acrylic resins which soften and go tacky when warm, we wouldn’t recommend its use for this application. The maximum temperature it could go to before it starts to go soft would be something like 40-50°C.

No, but you could use Rust-Oleum Hard Hat 2500 Transparent Protection instead. Allow the Rust-Oleum Custom Filled Aerosols to dry for at least 48 hours before application of the clear protective coating.

Yes, but you must make sure the surface is thoroughly cleaned and lightly abraded to provide a key first.

Rust-Oleum Crystal Clear is the UK equivalent of the American product you have seen and will withstand temperatures up to 100°C (dry heat). It's ideal for providing a clear protective coat to many different surfaces and should be perfect for your coasters.