San Diego Boat and Hull Painting and Sand Blasting
619-218-1018

Marine paint, boat painting and large job sand blasting. 619-218-1018 

Yachts, Boat, Ship part 09-32 naval spec

Hull protective coatings.

Enamels, Epoxy's, High Gloss, and Interiors. 

Email boat make and model for quote 


Prep, prep , prep and more prep. Our sanding methods. 

Proper sanding promotes adhesion for the next coat. Excessive

sanding or using too coarse a grit can open pores in the surface or

create a sanding scratch profile too deep to be filled by the next

product to be applied. This can cause porosity holes in gelcoat and

sand scratch print–through. High Skill level is required. One professional sander is good for about 5 hours sanding per day. 

All 5 types may be accomplished by hand, machine, block or blaster.
The surface shape, size  and quality requirements will determine the tools or combination of  tools required.


1. Scratch Sanding: Scuffing or scratching a smooth surface to create

a profile to promote adhesion of another coating.

3M Scotch-Brite® Pads #’s 7447 or 7448 may be used to push

stripe edges down or remove light overspray from primer. Caution is

recommended when considering Scotch-Brite® for scratch sanding

between topcoats as adhesion will be questionable. Sandpaper is

recommended.

2. Smooth Sanding: Sanding the surface smooth of orange peel or

fine texture.

This is usually done with air tools, electric D8's, small blocks, small pad machine or hand

sanding using relatively fine grits. This type of sanding is not

considered fairing.

3. Block Sanding: Block sanding is used for fairing.

Block sanding by hand-board or machine is used to level a surface.

The depth and height of the highs and lows, and the width between

them, will determine the size block as well as the amount of

filler/surface products needed to fair the surface.

4. Grinding: Is for the removal of material. Grits are coarse, 24–36–60,

with the primary purpose being removal of undesirable material and

creating surface profile.

Grinding would be used to brighten corroded metal, remove old

coatings and to remove heavily oxidized or damaged gelcoat.

5. Sand blasting: the ultimate in protective coat adhesion and surface prep. Makes really bad surfaces like new again. Especially good for aluminum and steel boats but can also be applied to wood and fiberglass using different materials. Its starts for 30 ft boats at $10,000 for entire boat surface. Expenses in cleaning basting air, high cost of labor to blast, hard after job clean up and very dangerous. I would only use Greg Moore. No one else that smart would work so hard at get dirty. 


Hull Prep TYPES of HULL , there are hundreds of small professional steps but here is a guide to getting 1st coat of primer on. Too much work, email me for quote!

Aluminum

Degrease with solvent or Sand Blast with 30-40 grit garnet 

or  Sand well using 60-120 grit

(aluminum compatible) paper. Clean thoroughly and

allow to dry. Prime using stronium as soon

as possible (within 8 hours) follow next day with epoxy primer

the finish the product

recommendations provided in the paint systems

guides.


Lead Keels

Degrease with solvent or blast with garnet shells or 

Sand well using 120 grit

paper or power wire brush. Clean thoroughly

and allow to dry. Prime using an epoxy primer

following the product recommendations provided

in the paint systems guides.


Zinc/Galvanized Steel

Degrease with solvent or sand blast or

Sand well using 60-120 grit

(aluminum compatible) paper. Clean thoroughly and

allow to dry completely. Prime using an epoxy

primer following the product recommendations

provided in the paint systems guides.


Steel

Degrease with solvent. Grit blast to Sa 2.5 – near

white metal surface. If grit blasting is not possible,

grind the metal surface with 24-36 grit abrasive

discs to a uniform, clean, bright metal surface with

a 50-75 micron anchor pattern. Use angle grinder

on small areas. Clean thoroughly and allow to dry

completely. Prime using an epoxy primer then follow

the product recommendations provided in the final paint

systems guides.


Stainless Steel

Light grit blast to produce a profile of 50 microns,

clean thoroughly and allow to dry completely prior

to application of an epoxy primer then follow the

product recommendations provided in the final paint

systems guides.


Bronze

Clean thoroughly and abrade to bright metal using

80 grit paper. Take care when abrading bronze

propellers, as excessive abrading can alter the

profile of the propeller causing it to be out of balance.

Clean thoroughly and allow to dry completely before

applying products recommended for application

direct to bronze (see paint systems guides).


Cast Iron

Degrease with solvent. Grit blast to Sa 2.5. If grit

blasting is not possible, grind the metal surface with

24-36 grit abrasive discs to a uniform clean surface

with a 50-75 micron anchor pattern. Use an angle

grinder on small areas or a wire brush, prepare to

a minimum St.3 according to ISO8501-1. Clean

thoroughly with solvent and allow to dry completely.

Ensure that all evidence of corrosion (e.g. iron

oxide and iron sulphide) is removed prior to the

application of an epoxy primer then follow the

product recommendations provided in the final paint

systems guides.


Fiberglass

Degrease with solvent or Soda blast or

Sand well using 180-220

grit paper. Clean thoroughly and allow to dry

completely. Prime using an epoxy or one part then primer and finish

the product recommendations provided in the enamel or high gloss

systems guides.


Bare Wood/Plywood

Sand smooth with 80-180 grit paper and then 280

grit paper or walnut shell blast. Remove sanding dust by brushing or

dusting. Wipe down thoroughly with solvent and

allow to dry completely, to ensure any residual

sanding dust is removed, before applying products

recommended for application direct to wood

(see paint systems guides).


Oily woods e.g. teak

Ensure that the surface is thoroughly degreased

using a recommended solvent to ensure all oils

are removed. Sand smooth with 80-180 grit paper

and then 280 grit paper. Remove sanding dust

by wiping with solvent, to ensure any residual

dust is removed. Ensure the surface is completely

dry before applying products recommended for

application


Marine paint specs from proline a sherwin williams company. Proline Marine Paint technical Guide

For naval specs email email MIL spec paint questions to Greg Moore


SAND BLASTING MIl spec PDF download