Waaah! What sort of acid? Phosphoric, Oxalic, Nitric, Sulphuric, Hydrochloric, or:
| Acetic Acid | CH3COOH |
| Antimonic Acid | HSbO3 |
| Antimonous Acid | H3SbO3 |
| Arsenic Acid | H3AsO4 |
| Boric Acid | H3BO3 |
| Bromic Acid | HBrO3 |
| Bromous Acid | HBrO2 |
| Carbonic Acid | H2CO3 |
| Carbonous Acid | H2CO2 |
| Chloric Acid | HClO3 |
| Chlorous Acid | HClO2 |
| Chromic Acid | H2CrO4 |
| Chromous Acid | H2CrO3 |
| Citric Acid | C6H8O7 |
| Cyanic Acid | HCNO |
| Dichromic Acid | H2Cr2O7 |
| Disulfurous Acid | H2S2O5 |
| Dithionous Acid | H2S2O4 |
| Diuranic Acid | H2U2O7 |
| Ferricyanic Acid | H3[F3(CN)6] |
| Fluoric Acid | HFO3 |
| Fluorous Acid | HFO2 |
| Formic Acid | HCOOH |
| Hydroarsenic Acid | H3As |
| Hydrobromic Acid | HBr |
| Hydrochloric Acid | HCl |
| Hydrocyanic Acid | HCN |
| Hydrofluoric Acid | HF |
| Hydroiodic Acid | HI |
| Hydronitric Acid | HN3 |
| Hydrophosphoric Acid | H3P |
| Hydroselenic Acid | H2Se |
| Hydrosulfuric Acid | H2S |
| Hypobromous Acid | HBrO |
| Hypocarbonous Acid | H2CO |
| Hypochlorous Acid | HClO |
| Hypochromous Acid | H2CrO2 |
| Hypofluorous Acid | HFO |
| Hypoiodous Acid | HIO |
| Hyponitrous Acid | HNO |
| Hypooxalous Acid | H2C2O2 |
| Hypophosphoric Acid | H4P2O6 |
| Hypophosphous Acid | H3PO2 |
| Hyposulfurous Acid | H2SO2 |
| Iodic Acid | HIO3 |
| Iodous Acid | HIO2 |
| Manganic Acid | H2MnO4 |
| Metastannic Acid | H2SnO3 |
| Molybdic Acid | H2MoO4 |
| Nitric Acid | HNO3 |
| Nitrous Acid | HNO2 |
| Oxalic Acid | H2C2O4 |
| Percarbonic Acid | H2CO4 |
| Perchloric Acid | HClO4 |
| Perchromic Acid | H2CrO5 |
| Perfluoric Acid | HFO4 |
| Periodic Acid | HIO4 |
| Permanganic Acid | HMnO4 |
| Pernitric Acid | HNO4 |
| Peroxydisulfuric Acid | H2S2O8 |
| Perphosphoric Acid | H3PO5 |
| Persulfuric Acid | H2SO5 |
| Pertechnetic Acid | HTcO4 |
| Perxenic Acid | H4XeO6 |
| Phosphoric Acid | H3PO4 |
| Phosphorous Acid | H3PO3 |
| Pyroantimonic Acid | H4Sb2O7 |
| Pyrophosphoric Acid | H4P2O7 |
| Pyrosulfuric Acid | H2S2O7 |
| Selenic Acid | H2SeO4 |
| Selenous Acid | H2SeO3 |
| Silicic Acid | H2SiO3 |
| Silicofluoric Acid | H2SiF6 |
| Silicous Acid | H2SiO2 |
| Sulfuric Acid | H2SO4 |
| Sulfurous Acid | H2SO3 |
| Telluric Acid | H6TeO6 |
| Tellurous Acid | H2TeO3 |
| Tetraboric Acid | H2B4O7 |
| Tetrathionic Acid | H2S4O6 |
| Thiocyanic Acid | HSCN |
| Thiosulfurous Acid | H2S2O2 |
| Titanic Acid | H2TiO3 |
| Tungstic Acid | H2WO4 |
| Uranic Acid | H2UO4 |
| Xenic Acid | H2XeO4 |
Thank you. I will give that a try. You promise it won't melt through the PVC?I usually just have a rummage in the shed
Brick cleaner is cheap and plentiful, I have loads of that, seems to do the job
Thank you. I was a bit worried about doing that but I guess with round corners I can't do too much damage.
If you buy brick cleaner make sure it is one which is (hydrochloric) acid based. Eg Bostik Cementone Brick and Patio cleaner
Thanks. Yeah, I was worried about those suggestions. It was an expensive dinghy and I really don't want to damage it.
Are you really sure I won't end up with a pile of PVC?
I mean LSD might make the OP see some pretty patterns in the fouling, but probably not exactly what he had in mind…
PVC has good to excellent resistance to cold dilute hydrochloric acid
Moving on to your second question. . . . Flexible antifouling paint for PVC from Polymarine
.."only"...
That's good to know, thank you.