STRIPPING OEM paint from radiators can be a notoriously tricky job.
Commonly this is because radiators tend to have two coats of paint. These are a water-based electrocoat primer and a fusion-bonded, powder paint topcoat.
The most difficult layer of these to remove tends to be the water-based primer. This is because most traditional solvent-based paint strippers will not attack modern water-based paints.
How to remove OEM paint from radiators with Biostrip - in just twenty minutes
Method One - in the home
Simply grab a clean brush, and paint the radiator with Biostrip 20. Be sure to also paint inside all those tricky corners and creases. After around 20 minutes, you will be able to see that the paint has blistered all over. At this point, you can easily scrape off the blistered paint. On doing this, you will see that the Biostrip will have easily penetrated both layers of paint. Scraping will reveal a clean, paint-free radiator; stripped back to its original, pre-painted state.
All that remains is to wash the radiator thoroughly with soapy water, followed by clean, fresh water. Allow the radiator time to dry and then simply repaint it.
Method Two - for industry
An even easier method (although not suitable for home stripping) to remove all the paint from the radiator is to dip it in a tank of Biostrip 42 heated to around 25 C until the paint has fully blistered.
NOTE: The above methods and timings are for OEM painted radiators. Radiators that have been subsequently coated with gloss or extra layers of radiator paint may take longer and need more than one application.