Question: I want to renovate an old metal babies cot using your Eco paint.I intend having it sand blasted and my question, do I need to use a primer or undercoat before using your enamel? R.R.

Answer: We sell 3 enamels, the prices vary a lot, and the old adage about getting what you pay for applies!  If the cot is to last for one or two babies, then the Bio Waterbased Enamel would be a good choice. If you think the cot will be good for another 50 years then chose either the Bio Enamel oilbased (- needs Bio Thinners) or my favourite paint, Volvox ProAqua Enamel.

The data sheets say:

Volvox ProAqua Enamel

Metals must be primed with a coat of rust prevention paint

Bio Enamel Lacquer (either the Waterbased or the Oilbased)

METAL PRIMER : Provides anti-corrosive protection for steel, aluminum, brass and copper. Not effective on zinc and galvanized surfaces. The metal should be cleaned of all grease, dirt, processing soil, salt residues, weld scale, rust and other residue which is likely to affect the performance of a protective coating. Apply 1-2 coats of Metal Primer thinly and evenly. Lightly sand between coats when completely dry. Finish with Bio Enamel Lacquer, white or coloured.

We dont have an 'eco' metal primer, you'll have to chose a conventional product there. You don't need an undercoat between the metal primer and the paint.

I like the Volvox Proaqua Enamel because it is waterbased, it dries in half an hour, it has no smell, but best of all it is made from vinegar esthers, a new technology for paint. It is very hard wearing, and like all other enamels it is self-levelling. It is a medium sheen, not glossy and not flat.

So the choice is yours, the Bio waterbased enamel is the best price, Bio oil-based is made from plant oils, the same oils you might buy in a healthfood shop, it has no alcohol or drying agents so is slow to dry, in good weather wait a full 24 hours between coats, in humid cold and wet weather leave it a little longer between coats. Both Bio enamels are available in a semi-gloss or a matt. All are safe and natural paints.

Sorry to rant, I just realised you only asked about the undercoat!