Alluminium & Light Alloys Boats

TOPSIDES & UPERWORKS TREATMENT

NEW SUBSTRATE. Light sandblasting or mechanical sanding of aluminium and light alloy surfaces is necessary in order to remove aluminium oxides from the surface. Degrease the surface with a neutral type solvent before starting paint application. Follow then the recommended coating system.

PREVIOUSLY COATED SURFACES. In good conditions. If the old painting system is in good condition and it only needs a topcoat because it is dull, dirty or slightly powdering but with the underneath coatings still well fixed to the substrate (with no cracks or bubbles), proceed with thorough cleaning and degreasing followed by suitable sanding with medium-fine abrasive paper (180-240). Thoroughly remove dust and all sanding residuals before starting the paint application. Apply 1 to 3 coats of finishing topcoat compatible with pre-existing paints.
In poor conditions. If the old painting system is in poor condition with cracking or flaking paint, it is then necessary to completely remove the old paint back to bare aluminium by scraping, sanding with coarse abrasive paper (80-100) or by using Svernigraf paint remover. Then proceed with the surface preparation as already described for NEW SUBSTRATES and follow up with the suggested coating system for aluminium and light alloys.

BOTTOM TREATMENT

NEW SUBSTRATE. Please refer to what has been already described in NEW SUBSTRATES for Topsides and Upperworks.

PREVIOUSLY COATED SURFACES. In good conditions. If the bottom is in good condition it is generally enough to remove any powdering parts of the old antifouling with fine abrasive paper and apply 2 coats of new antifouling compatible with the old one. If the type of the old antifouling is not known it is recommended to apply 2-3 coats of SOLVER PRIMER intermediate coat before applying the new antifouling. In poor conditions. If the old paint is in poor condition it is necessary to remove this completely by scraping back to the bare surface or by using Svernigraf remover. Then proceed with surface preparation as already described in NEW SUBSTRATES and follow with the suggested coating system.
Note: In accordance to our recommended bottom coating system for aluminium and light alloys we advise the use of Serenissima SR or Hard Speed antifoulings, as specifically compatible with aluminium boats.