External Plastic extrusion blotches

[pandas]

Between each of the main external panels on our Hymer specifically the join from the front to the top and ditto the back join to the top the plastic extrusion is really blotchy. Mould like growth that is difficult to remove. Any others have this and is there an easy solution to get rid of it. We had a ceramic paint sealer applied before we too delivery and it is two years old.

 

[RM_Marine]

Did the sealer have a guarantee with it or was it just for the paint

I've used wet and forgot on the roof followed by Williams waterless wax all over as they are both easy to use and get into the places that I think might get mold but if you have a guarantee give them a phone and see what think

 

[pandas]

Did the sealer have a guarantee with it or was it just for the paint

I've used wet and forgot on the roof followed by Williams waterless wax all over as they are both easy to use and get into the places that I think might get mold but if you have a guarantee give them a phone and see what think

The sealer was for the paint but been recommended ‘ Brake Cleaner’ to make the extrusions clean again.
Plus the GRP bonnet having had another polish and then retreated only 2 months ago looks awful again - blotchy and yellow peaking through so decided it a manufacturers faulty product. Meanwhile will look at either having the bonnet re sprayed or applying a ‘wrap’. Seems it is an issue only with A Class Motorhomes. Might even have a go at wrapping myself.