For your convenience, I’ve highlighted the hyperlinks. Click on the hyperlink to get more information about the selected product.Repelin
will work and will not harm your finish, however VS721 Bottom Coat
will work better on fiberglass boats. It's important to get your hull back to pristine before you apply it.
If you have any remaining growth, use Algae Strip
to get it off (no hard work, roll on, rinse clean) If the growth is all off, you don't need this. If you have any stain, use Waterline Stain Remover
(no hard work, roll on, rinse clean). If there are no stains, you don't need this. If there is any growth remaining on your stern drive or lower leg of you OB, use Algex
to get this off. Again, if it's perfectly clean, you don't need this.
Use Boat Scrub
to clean and prep the hull, even if the bottom is clean. Use a Marin Power Mitt
if you want to save some labor/effort. This will also get scuff marks and oxidation off, if present. Rinse clean and let dry. Apply VS721 Bottom Coat
with a damp sponge or cloth and wipe off the haze with a dry cloth. After 24 hours, repeat. Wait 48 hours before launching your boat. You're good to go.
If your boat is on a trailer go to Ask The Skipper > Bottom Cleaning > "How to raise your boat off the trailer"
, to get information about getting under the bunks or rollers. There is more information here about cleaning, restoring and protecting your boat. VS721 Bottom Coat
will not ruin or damage your gelcoat. It is recommended by several boat manufacturers to protect their boats against osmosis blisters if the boat is left in the water.
Thanks for your question.